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【单选题】
流体在作( )流动时,其质点沿作有规则的平行运动
A.
层流
B.
湍流
C.
过渡流
D.
漩涡流
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参考答案:
举一反三
【多选题】能自行制造大涵道推力高性民用涡扇发动机的国家有 。
A.
美国
B.
英国
C.
俄罗斯
D.
中国
【简答题】A. The man should go to see a doctor. B. She'd like to postpone working on the proposal. C. She wants to know why the proposal was late D. It won't take long to finish the proposal.
【简答题】根据培养基性质和用途,可将培养基分为几类?
【简答题】Suppose you are going to start one of the following small businesses. As you are the boss of the business, you are responsible for everything in the business. Work in groups. Each group takes u one o...
【单选题】The research plan should be presented in a written proposal. The proposal should include all of the following EXCEPT ________.
A.
how the results will help management's decision making
B.
research objectives
C.
the predicted results
D.
estimated research costs
【判断题】The title of a research proposal should be self-explanatory.
A.
正确
B.
错误
【单选题】设矩阵 有特征值 ,对应的特征向量为 , 为( ).
A.
-2,2,1
B.
1,1,2
C.
1,1,3
D.
1,3,3
【判断题】There is a clear format about what the thesis proposal should be like in our university.
A.
正确
B.
错误
【多选题】按照支出主体划分,消费可分为( )。
A.
居民消费
B.
企业消费
C.
实物消费
D.
政府消费
E.
服务消费
【多选题】硬件系统包括( )。
A.
主机
B.
外部设备
C.
CPU
D.
外存储器
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