单选题：第50题__________

题目分类：卫生类
题目类型：单选题
查看权限：VIP

题目内容：

第50题__________ A．A limited water supply
B．so that it can be used again just as if it were fresh from a spring
C．It is possible to purify large amounts of sea water
D．But even if every large city purified and reused its water
E．And we cannot even use all of that
F．Experiments have already been done in this field

参考答案：

答案解析：

It can be inferred, from the passage that a smart consumer

It can be inferred, from the passage that a smart consumer should__________.A．t

分类：卫生类题型：单选题

The purpose of this article is to__________.

The purpose of this article is to__________.A．warn us of the wickedness of nappi

分类：卫生类题型：单选题

Atlas got the golden apples for Hercules because he wanted t

Atlas got the golden apples for Hercules because he wanted to be the king himse

分类：卫生类题型：单选题

_____________

_____________A．where B．this C．which D．that

分类：卫生类题型：单选题

As showed in the experimental study, rapid eye movement is

As showed in the experimental study, rapid eye movement is characterized by____

分类：卫生类题型：单选题