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【简答题】
截平面与圆锥相交,当截平面通过锥顶时,圆锥面的交线是 ;当截平面垂直于轴线时,截交线是 ;当截平面与圆锥的顶点和底面均不相交时,截交线是 ;当截交线平行于圆锥母线时,截交线是 。
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【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.
【单选题】下列各组词中,属于词义缩小的一组是( )。
A.
让，原指指责，后指推让。
B.
贿，原指财物，后指行贿、贪财等。
C.
本，原指树根，后指事物的基础。
D.
宫，原是房屋的通称，后专指帝王的居所。
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【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】There is a clear format about what the thesis proposal should be like in our university.
A.
正确
B.
错误
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