搜题请搜索小程序“爱下问搜题”
问题 选择题

在工业社会阶段，人类与自然环境的关系是

A．人地关系全面呈现不协调

B．人类被动适应自然

C．人对自然界的依附性增强

D．环境问题对人类的威胁并不严重

答案

答案：A

工业社会阶段，人类与自然环境的关系是人地关系全面呈现不协调；人类主动的征服自然；人对自然界的依附性减小；环境问题对人类的威胁越来越严重。

单项选择题

A recent survey of all auto accident victims in Dole County found that, of the severely injured drivers and front-seat passengers, 80 percent were not wearing seat belts at the time of their accidents. This indicates that, by wearing seat belts, drivers and front-seat passengers can greatly reduce their risk of being severely injured if they are in an auto accident.
The conclusion above is not properly drawn unless which of the following is true

A．Of all the drivers and front-seat passengers in the survey, more than 20 percent were wearing seat belts at the time of their accidents.

B．Considerably more than 20 percent of drivers and frontseat passengers in Dole County always wear seat belts when traveling by car.

C．More drivers and front-seat passengers in the survey than rear-seat passengers were very severely injured.

D．More than half of the drivers and front-seat passengers in the survey were not wearing seat belts at the time of their accidents.

E．(E) Most of the auto accidents reported to police in Dole County do not involve any serious injury.
查看答案
多项选择题 X型题

下列关于溶液的等渗与等张的叙述中，哪些是正确的（）

A.等渗溶液是指渗透压与血浆相等的溶液，是物理化学概念

B.等张溶液是指与红细胞膜张力相等的溶液，是生物学概念

C.等渗溶液不一定等张，但多数药物等渗时也等张

D.等渗不等张的药液调节至等张时，该溶液一定是低渗

E.0.9%氯化钠溶液为等渗溶液，但并不是等张溶液
查看答案