更多“美国著名人类学家摩尔根在其著作《（）》中，描述了北美印弟安人”相关的问题
内控外泄式顺序阀的泄漏油是( )。
A. 内泄B. 外泄C. 不泄
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Part II Reading Comprehension Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the center. Passage One Questions 5 and 6 are based on the following passage. California has been facing a drought for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system. The problem is growing as the population of the state continues to expand. New research has found deep water reserves under the state which could help solve their drought crisis. Previous drilling of wells could only reach depths of 1,000 feet, but due to new pumping practices, water deeper than this can now be extracted ( 抽取 ). The team at Stanford investigated the aquifers( 地下蓄水层 )below this depth and found that reserves may be triple what was previously thought. It is profitable to drill to depths more than 1,000 feet for oil and gas extraction, but only recently in California has it become profitable to pump water from this depth. The aquifers range from 1,000 to 3,000 feet below the ground, which means that pumping will be expensive and there are other concerns. The biggest concern of pumping out water from this deep in the gradual settling down of the land surface. As the water is pumped out, the vacant space left is compacted by the weight of the earth above. Even though pumping from these depths is expensive, it is still cheaper than desalinating( 脱盐 )the ocean water in the largely coastal state. Some desalination plants exist where feasible, but they are costly to run and can need constant repairs. Wells are much more reliable sources of freshwater, and California is hoping that these deep wells may be the answer to their severe water shortage. One problem with these sources is that the deep water also has a higher level of salt than shallower aquifers. This means that some wells may even need to undergo desalination after extraction, thus increasing the cost. Research from the exhaustive study of groundwater from over 950 drilling logs has just been published. New estimates of the water reserves now go up to 2,700 billion cubic meters of freshwater. How could California’s drought crisis be solved according to some researchers?
A. By building more reserves of groundwater.B. By drawing water from the depths of the earth.C. By developing more advanced drilling devices.D. By upgrading its water distribution system.
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在线测量交互信号说法正确的是（）。
A.PLC和测量柜：测量信息交互
B.PLC和测量柜：测量结果交互
C.测量柜和机器人：测量过程
D.测量柜和机器人：补偿过程
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"材料成本差异"科目在期末的借方余额反映的是（）。
A. 库存材料的超支差异B. 库存材料的节约差异C. 发出材料应负担的超支差异D. 发出材料应负担的节约差异
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某班学生统计学期末考试成绩数据如表3 -1所示。要求：
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医疗机构麻醉药品处方应当至少保存
A.1年
B.2年
C.3年
D.4年
E.5年
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无差异性目标市场策略主要适用于（）的情况。
A . A、企业实力较弱
B . B、产品性质相似
C . C、市场竞争者多
D . D、产品性质差异
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俄国二月革命是资产阶级民主革命，其结果却超出了一般资产阶级民主革命范畴，具体表现在（）（1.0分）
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根据《国家三、四等水准测量规范》（GB12898-91）规定，用DS3进行三等水准测量中丝法中，同一水准尺、黑红面中丝读数之差是：±1mm。
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按照需要在人类历史上的起源，能够把需要分为（）
A.物质需要与精神需要B.生理性需要与社会性需要C.主观需要与客观需要D.现实需要与潜在需要
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对交直交机车/动车组描述不正确的是（）。
A.采用四象限变流技术 B.采用GTO或IGBT等全可控器件 C.谐波含量很大 D.功率因数低
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下列选项属于收货人的主要违约责任的包括（）。
A.收货人逾期领取货物要承担货物的仓储保管费
B.收货人应当补交托运人未交或者少交的运费，迟交的要承担滞纳金
C.因收货人的提货行为而造成承运人其他财产损失的，应承担赔偿责任
D.未按照合同规定的时间和要求提供货物
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\t垂直于直线且平行于平面7x+8y+9z+10=0的直线是()。\t
\tA.A
\tB.B
\tC.C
\tD.D
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索氏提取法测定脂肪时，抽提时间是（）。
\tA.用滤纸检查抽提完全为止
\tB.虹吸产生后2小时
\tC.抽提6小时
\tD.虹吸20次
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