正确答案: B

山谷风

题目：在山区出现的、方向有昼夜转换现象的地方性风叫做（ ）

解析：B

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学习资料的答案和解析：

[单选题]Passage FourAfter a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the previous day. The rest that you get while sleeping enables your body to prepare itself for the next day.

Sleep

解析：答案为A。根据文章大意及第一段第二句可知。

[单选题]中度缺钠时，下列正确的是( )

每公斤体重缺氯化钠0.5～0.75g