题目内容 (请给出正确答案)
提问人:网友13***556 发布时间:2022年6月12日 23:18
[ 单项选择题]

按照我国招标投标法的规定,自发出招标文件至投标截止时间不少于( )天。

A.10

B.18

C.20

D.30

参考答案
十点题库官方参考答案 (由十点题库聘请的专业题库老师提供的解答)
更多“按照我国招标投标法的规定,自发出招标文件至投标截止时间不少于”相关的问题
与交界性大疱性表皮松解症相关的是()。
A . 编码K5和K14的基因突变
B . 编码板层素5和ⅩⅦ型胶原基因突变
C . 编码Ⅶ型胶原基因突变
D . 角化细胞黏附障碍
E . 类固醇硫酸酯基因缺陷
点击查看答案
按承压方式分,压力容器可以分为内压容器和外压容器,若某内压容器设计压力为12MPa,则该压力容器为()。
A.低压容器
B.中压容器
C.高压容器
D.超高压容器
点击查看答案
什么是健康四大基石?
点击查看答案
( )是一种过热组织。
A.珠光体 B.渗碳体 C.贝氏体 D.魏氏组织
点击查看答案
女,35岁,孕6个月,因接触性出血行活检为宫颈癌Ⅰal期,最佳治疗方案为()。
A.维持妊娠至足月,经阴道分娩,如果不需要生育者,可于产后6月行全子宫切除术 B.维持妊娠至足月,在行剖宫产的同时行全子宫切除及盆腔淋巴结清扫术 C.尽快行全子宫切除及盆腔淋巴结清扫术 D.先行体外照射,待胎儿自然流产后再行腔内放疗 E.先剖宫取胎,然后给予体外及腔内放疗
点击查看答案
顾恺之在其著作()中说“以形写神而空其实对,荃生之用乖,传神之趣失矣。”
A.《魏晋胜流画赞》 B.《淮南子》 C.《女史箴图》 D.《洛神赋图》
点击查看答案
按照基因结构改变的类型,基因突变可分为()。
A. 碱基置换突变 B. 移码突变 C. 碱基缺失突变 D. 碱基插入突变
点击查看答案
转口贸易项下的出口收汇无须进入待核查账户。
A.对 B.错
点击查看答案
若5#皮带停运,下列说法正确的是()。
A、碳化岗位各碱口收至最小 B、联系请回车间停11、12、13、14#离心机 C、停3#皮带 D、停4#皮带 E、停所有皮带 F、碳化碱口关
点击查看答案
微积分是由谁发明的?
点击查看答案
Economizing of the PoorComprehending Economizing of the Poor Walking down the aisles of a supermarket, low-income shoppers must consider a number of factors including quantity, price, quality and nutritional differences when selecting food products. Food-purchase decisions by the poor often entail balances among taste, preference and quality factors— either real or perceived — to meet spending constraints. Within broad product categories such as cereal, cheese, meat and poultry, and fruits and vegetables, shoppers can choose among many substitutable products. Low-income shoppers can extend their food dollars in a number of ways. They may shop in discount food stores; they may purchase and consume less food than higher-income shoppers; they may purchase low-priced (and possibly lower quality) food products; or they may rely on some combination of all three. A better understanding of how the poor economize in food spending addresses important policy questions raised by researchers, nutrition educators, and food-assistance program managers.The Correlation between the Location and Price Whether the poor face significantly different food prices due to where they shop for food remains an unresolved empirical question. Extensive research over the years has tried to answer the question — Do the poor pay less for food The Economic Research Service (ERS) in 1997 received the results of studies comparing price differences in grocery stores across different income levels and combined these with current census data on the distribution of low-income households by urbanization type. The ERS study concluded that, in general, the poor face higher prices due to their greater representation in urban and rural areas (as opposed to suburban areas), where food prices tend to be higher.Higher Prices but Less Spending Based on results from household surveys, ERS also found that despite facing higher prices, low-income shoppers spend less than higher-income shoppers for food purchased in food stores. Due to their level of aggregation and lack of in-store sales and promotion information, such surveys shed little light on the economizing practices of households. To learn more about how low-income shoppers spend less for food despite facing higher prices, we obtained food-store purchase data that incorporate per-capita quantity and expenditure-measure equivalents (household measures adjusted for household size) across income levels.The Main Economizing Practices The resulting comparisons describe how individuals with different levels of income vary in their food-spending patterns. By using actual transaction data, detailed information about the product purchased (for example, price, product description, package size, and brand name) as well as the condition of purchase (promotion, coupon, or sale item) was obtained. From these, the average unit cost (per ounce, per pound) for each item was calculated. Low-income shoppers may use four primary economizing practices to reduce their food spending. First, they may purchase a greater proportion of discounted products. Second, they may purchase more private-label products (generic or store brand) versus brand products than higher-income shoppers buy. Third, they may take advantage of volume discounts by purchasing larger package sizes. Fourth, they may purchase a less-expensive food product within a product class. Although quality differences such as freshness, convenience and taste often contribute to prices differences, differences in nutritional quality are also evident.More Spending on Promotional Items The use of promotions is measured by comparing the percentage of expenditures and quantities of each product purchased on promotion (manufacturers’ coupons, store coupons, store sales, and other promotions). For random-weight cheese, fruit, vegetables and meat in 1998, low-income households (less than $ 25,000 per year) spent a greater share of expenditures for products on promotion than other households. (This is also true for quantities purchased on promotion.) For poultry, however, middle-income households spent about the same percentage on promotion as low-income households (36% versus 35%, respectively). For both groups, spending for promotion items was at least five percentage points more than spending by the high-income group. Among fixed-weight products, promotion-spending patterns differed. Low-income shoppers purchased the lowest share of total ready-to-eat (RTE) cereal on promotion. This result may be explained by other economizing practices in this product category — such as purchasing a larger percentage of private-label products, which are on promotion less often, but have lower non-sale prices than the brand-name alternatives. Low-income households spent 11.5% of their RTE cereal expenditures on private-label cereals, while the higher-income households spent lower shares, with those shares decreasing with increasing income levels. A similar pattern is found for the quantities of private-label RTE cereal purchased.Choice of Package Size Choice of package size also enables those in low-income households to economize by purchasing larger packages, which often have lower per-unit prices than smaller packages. However, data on expenditure shares for RTE cereal and packaged cheese show that low-income households’ purchases of large packages of RTE cereal were less than such purchases by other households in 1998. In 1998, households earning $ 50,000 or more spent 23.1% of cereal purchases on large packages, compared with 15.8% by the low-income group. A similar pattern was found for fixed-weight cheese products. In fact, low-income households had the lowest proportion of large-package purchase of all income groups. This behavior has three possible explanations: Low-income shoppers do not have access to stores that sell large packages; they cannot afford to store staple products, and they perceive that the cost of storing large packages is higher than the savings from the volume discount. A combination of these constraints likely accounts for much of the observed difference in package size quantities purchased and expenditures on those packages by the different income groups. Low-income shoppers may also be economizing by purchasing a less costly combination of fruit and vegetable product types. On average, low-income households paid 11.5% less per pound for vegetables than high-income households, and 9.6% less per pound for fruit. This price measurement is a function of the quality and expenditures that each household type devotes to fruits and vegetables. Overall, low-income households purchased 3.3% less fruits and vegetables (by weight) per person than high-income households, but they paid 13% less. This implies that these households are choosing less expensive fruits and vegetables, which saves a lot for them. (1,005 words)
点击查看答案
关于前瞻性队列研究基本特征的叙述,下列哪项最恰当?()
A.调查者必须在研究人群发病或死亡发生前就开始研究,同时确定暴露状况
B.调查者必须根据疾病或死亡发生前就已存在暴露因素对研究人群加以分组,并能发现该人群中的新发病例或死亡
C.调查者必须在研究开始时就分清人群队列
D.调查者必须选择病例和对照,并测量暴露
E.调查者必须比较队列中暴露组和非暴露组的发病率
点击查看答案
注册地位于农村的企业贷款均应属于涉农贷款。()
点击查看答案
关于审美创造与异化劳动的关系,正确的理解为()。
\tA.异化劳动不能创造美
\tB.异化劳动只能创造丑
\tC.异化劳动扼杀创造美
\tD.异化劳动既制造丑又创造美
点击查看答案
将流量控制用于TCP数据传输的原因是什么()。
A.同步设备速度以便发送数据
B.同步并对序列号排序,从而以完整的数字顺序发送数据
C.防止传入数据耗尽接收方资源
D.在服务器上同步窗口大小
点击查看答案
客服
TOP