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【单选题】
水泵的总扬程 H=H st + Σh, 其中好 H st 为 ()A.
总扬程
B.
吸水扬程
C.
静扬程
D.
压水扬程
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【单选题】下列选项中，关于Get请求和Post请求描述错误的是（ ）。
A.
Get请求是将需要提交给服务器的数据
B.
Post请求是将请求数据封装到请求报文中进行发送
C.
Get请求是将请求数据封装到请求报文中进行发送
D.
向服务器发送请求的两种方式是Get和Post
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A.
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B.
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C.
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D.
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【单选题】John______ now for the light in his room is still on.
A.
must study
B.
must be studying
C.
must have studied
D.
would have studied
【简答题】看图填词。 John is an American student. He is studying Chinese in China. He can speak a 1_______ Chinese now. One day when he was lying (躺) on the 2_______ and 3_______ to the radio. He had a good 4______...
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