压力源的心理社会因素为( )
A．温度过热过冷B．空气C．过饱D．水污染E．恐惧
参考答案：E
用所给词的正确形式填空。
1. I'm ________ (turn) on the radio.
2. Who ________ (sing) first?
3. I ________ (watch) a movie yesterday.
4. There ________ (be) many people in Canada.
5. Thanks for ________ (give) me this apple.
接到机车油、水化验样品，应在什么情况下进行？
