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【多选题】
西班牙语里有哪些不同的式?A.
陈述式
B.
命令式
C.
虚拟式
D.
条件式
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【简答题】根据句意从方框中选用合适的词语，并用其适当形式填空。 knowledge; I; in the slightest; friendly; think of 1. If you were more _____ to people, you would have more friends. 2. I'd introduce _____ if I wanted to be friends wit...
【简答题】阅读理解。 Dear Thomas, You are right, Thomas. Learning English isn't easy. My friend Jimmy says he learns a lot by working in a store, but I think I learn more at school. When we have tests, I always use ...
【简答题】阅读理解。 选择恰当的主题句。 A. I don't really know my daughter,for she isn't easy to get on with. B. We were closest when she was about four,which I think is a wonderful age for a child. C. We have the same taste...
【单选题】下列关于粘性系数的描述正确的是( )。
A.
温度变化，气体粘性系数随之变化，而液体粘性系数则保持不变
B.
流体动力粘性系数等于流动粘性系数与密度的比
C.
运动粘性系数大的流体，动力粘性系数也大
D.
运动粘性系数的单位为m 2 /s
【单选题】下列关于流体粘性系数的描述正确的是
A.
动力粘性系数大的流体，运动粘性系数也大
B.
温度升高时，液体的动力粘性系数增大
C.
温度下降时，气体的动力粘性系数减小
D.
运动粘性系数的单位为
【简答题】任务型阅读。 My friend Eric is a funny boy. He can speak Chinese , English and Japenese(日语). Why can he speak these languages? Because his father is American. His mother is a Japanese and he was bo...
【简答题】从括号中画出合适的词完成句子。 1. _____(Can, Are, Do) you like bananas? 2. _____(Do, Does, Are) your brothers like sports? 3. _____(Do, Does, Is) your mother have a sister? 4. My best friend, Jim, _____(don't, isn't...
【单选题】以下句子中，结构为“主语—动词（单宾语及物）—宾语”的是：
A.
He worked out the difficult problem.
B.
They walked quickly along the riverbank.
C.
The letter lay open on his desk
D.
The storm will continue.
【简答题】(中国农业大学2007—2008年度秋季学期期末考试试题)用工程单位制表示流体的速度、管径、运动粘性系数时，管流的雷诺数Re=104，问采用国际单位制时，该条件下的雷诺数是多少?为什么?
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