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单项选择题

下列混合物中，可以制成温度最低的制冷剂体系是( )
A．水+甘油 B．水+食盐 C．水+冰D．冰+氯化钙

A.水+甘油
B.水+食盐

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单项选择题

申请换领驾驶证时，应当填写《机动车驾驶证申请表》，不需提交的证件和资料是__________

A.申请人的身份证明
B.医疗机构出具的有关身体条件的证明
C.人身保险单
D.机动车驾驶证

未知题型

The theory mentioned in line 1 relates to the conceptual models discussed in the passage in which of the following ways?
A．It may furnish a valid account of ore-forming processes, and, hence, can support conceptual models that have great practical significance.
B．It suggests that certain geological formations, long believed to be mineralized, are in fact mineralized, thus confirming current conceptual models.
C．It suggests that there may not be enough similarity across Archean-age gold-quartz vein systems to warrant the formulation of conceptual models.
D．It corrects existing theories about the chemical halos of gold deposits, and thus provides a basis for correcting current conceptual models.
E．It suggests that simple prospecting methods still have a higher success rate in the discovery of gold deposits than do more modern methods.

单项选择题

城市化严重超前产生的问题包括

A.城市发展逆城市化，市中心空洞化
B.住房紧张，社会秩序混乱
C.劳动力不足
D.绿地增多，城市环境有很大改善

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