人如果漂浮于海洋中，无淡水供应，就有生命危险，而喝海水只会提

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问题选择题

人如果漂浮于海洋中，无淡水供应，就有生命危险，而喝海水只会提高这种危险性。这是因为喝海水后，内环境中的盐含量升高，致使[ ]

A．醛固酮的分泌量增加，人体排出的水要比喝入的海水多

B．醛固酮的分泌量减少，人体排出的水要比喝入的海水多

C．醛固酮的分泌量增加，人体排出的水要比喝入的海水少

D．醛固酮的分泌量减少，人体排出的水要比喝入的海水少

答案

答案：B

阅读理解

阅读下列对话，选择正确的答案。

Miss Wang: Good morning, boys and girls! I’m Wang Li. And I’m your（你们的）English teacher（教师）.

Boys and girls: Good morning, Miss Wang!

Miss Wang: This is Helen. She is English（英国人）.

Helen: I’m Helen. Nice to meet you.

Miss Wang: Are you Dale?

Frank: No. I’m Frank.

Miss Wang: OK. Now, Frank, what’s this in English?

Frank: It’s a ruler, Miss Wang.

Miss Wang: What color is it?

Frank: White.

Miss Wang: Right. And what color is this pen?

Frank: It’s blue. I like（喜欢）blue, because（因为）I like the sky（天空）.

Helen: No. The pen is green. And I like green. Look! My jacket is green.

Miss Wang : Great!

小题1: is the English teacher.

A．Helen B．Frank C．Miss Wang

小题2:The boy is .

A．Frank B．Dale C．White

小题3:The ruler is .

A．blue B．green C．white

小题4:The jacket is .

A．white B．green C．blue

小题5:The _______ is blue.

A．ruler B．sky C．pen

判断题

焊接前的预热有助于减小焊接应力。