更多“地方储备和调控粮油财政补贴资金来源可以是（）。”相关的问题
流体运动的连续性方程是根据（）原理导出的。
A.动量守恒
B.质量守恒
C.能量守恒
D.力的平衡
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耙斗装岩机绳轮的轮槽磨穿，主要原因是（）。
A.未经常注油转动不灵
B.轴承严重磨损未换
C.安装歪斜
D.绳轮接触不严实
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在未约定先后履行顺序的双务合同中，当事人一方在对方未为对待给付以前，有拒绝自己给付的权利，这被称为（）。
A.不安抗辩权
B.先履行抗辩权
C.同时履行抗辩权
D.后履行抗辩权
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其它条件一定时，棉纤维团蓬松后积存的空气多，其（）
A.导热性增加
B.导热性降低
C.保暖性增加
D.保暖性降低
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男性，38岁，颅脑外伤。住院后病人的卧位是抬高床头15～30cm，其目的是
A．利用呼吸通畅B．防止呕吐窒息C．舒适D．利用血液循环E．减轻脑水肿
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施工现场内使用的三相四线制照明线路中，当照明器为白炽灯时，中性线截面不小于相线截面的30%。()
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第一个中文武侠RPG游戏是《侠客英雄传》，后来出了《轩辕剑》系列和（）。
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《特种设备安全监察条例》规定：锅炉、压力容器、电梯、起重机械、客运索道、大型游乐设施的作业人员及其相关管理人员（以下统称特种设备作业人员），应当按照国家有关规定经特种设备安全监督管理部门考核合格，取得国家统一格式的特种作业人员证书，方可从事相应的作业或管理工作。
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配电运检单位负责应用配电自动化系统对所辖区域内配电网进行遥控操作、故障处理等调控运行工作（）
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技术经济分析的特点是综合性、预测性、计量性、实用性。()
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TEXT A Although it is now possible to bring most high blood pressure under control, the muses of essential hypertension remain elusive. Understanding how hypertension begins is at least partly a problem of understanding when in life it begins, and this may be very early--perhaps within the first few months of life. Since the beginning of the century, physicians have been aware that hypertension may run in families, but before the 1970s, studies of the familial aggregation of blood pressure treated only populations 15 years of age or older. Few studies were attempted in younger persons because of a prevailing notion that blood pressures in this age group were difficult to measure and unreliable and because essential hypertension was widely regarded as a disease of adults. In 1971, a study of 700 children, ages 2 to 14, used a special blood pressure recorder which minimizes observer error and allows for standardization of blood pressure readings. Before then, it had been well established that the blood pressure of adults aggregates familially, that is, the similarities between the blood pressure of an individual and his siblings are generally too great to be explained by chance. The 1971 study showed that familial clustering was measurable in children as well, suggesting that factors responsible for essential hypertension are acquired in childhood. Additional epidemiological studies demonstrated a clear tendency for the children to retain the same blood pressure patterns, relative to their peers, four years later. Thus, a child with blood pressure higher or lower than the norm would tend to remain higher or lower with increasing age. Meanwhile, other investigators uncovered a complex of physiologic roles--including blood pressure--for a vasoactive (作用于血管的)system called the kallikrein-kinin(血管舒缓酶－激酞原)system. Kallikreins are enzymes in the kidney and blood plasma which act on precursors (先兆) called kininogens to produce vasoactive peptides(酞)called kinins. Several different kinins are produced, at least three of which are powerful blood vessel dilators. Apparently, the kallikrein-kinin system normally tends to offset the elevations in arterial pressure that result from the secretion of salt-conserving hormones such as aldosterone(醛固酮) on the one hand and from activation of the sympathetic nervous system (which tends to constrict blood vessels) on the other hand. It is also known that urinary kallikrein excretion is abnormally low in subjects with essential hypertension. Levels of urinary kallikrein in children are inversely related to the diastolic blood pressures of both children and their mothers. Children with the lowest kallikrein levels are found in the families with the highest blood pressure. In addition, black children tend to show somewhat lower urinary kallikrein levels than white children, and blacks are more likely to have high blood pressure. There is a great deal to be learned about the biochemistry and physiologic roles of the kallikrein-kinin system. But there is the possibilitythat essential hypertension will prove to have biochemical precursors.
A．A low output of urinary kallikrein is a likely cause of high blood pressure in children.B．The kallikrein-kinin system plays an important role in the regulation of blood pressure.C．Essential hypertension may have biochemical precursors which may be useful predictors in children.D．The failure of the body to produce sufficient amounts of kinins is the cause of essential hypertension.
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境内某公司（出口商）与境外公司双方签订买卖合同，货物出口后，境外公司通过其境内离岸账户把货款汇入境内公司账户上。同时该客户还想通过银行办理两笔服务贸易项下汇出汇款业务。问：该笔业务的申报主体是（）。
A.境内企业
B.境外公司
C.银行
D.均可
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薄壁组织的薄壁细胞形态多样,其主要特征有:
A. 一般呈等径的多面体； B. 排列疏松，间隙大； C. 仅有较薄的初生壁，没有次生细胞壁； D. 细胞器全，液泡发达，有 大量后含物。
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下列关于转铁蛋白结构描述正确的是（）。
A.分子量79.5kD B.含糖量18％ C.由4个亚基组成 D.为双链糖蛋白 E.含有180个氨基酸残基
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