一个人要在公众面前讲话前,心跳加速,血压升高,这一现象是()
A.应激的行为反应
B.应激的情绪反应
C.应激的生理反应
D.应激的防御反应
E.以上都不是
参考答案:C
单词拼写。
1. The news quite ______ (使心烦意乱) him.
2. She devoted herself ______ (完全地) to her research.
3. He wore a long and ______ (宽松的) coat.
4. It is beyond my p ______ to help you.
5. She c ______ in the exam by looking at my paper yesterday.
6. Let's have some sports o______ instead of staying indoors on such a fine day.
滑床板损坏、变形或滑床台磨耗大于()时,应有计划地进行修理或更换。
A、1mm
B、2mm
C、3mm
D、6mm