问题
多项选择题
连接螺栓未拧紧会造成什么危害?()
A.会造成连接处的电阻增大;
B.充放电过程中极易引起打火;
C.严重时导致发热、起火,发生事故;
D.影响不大。
答案
参考答案:A, B, C
连接螺栓未拧紧会造成什么危害?()
A.会造成连接处的电阻增大;
B.充放电过程中极易引起打火;
C.严重时导致发热、起火,发生事故;
D.影响不大。
参考答案:A, B, C
用方框中所给单词的适当形式填空,每词限用一次。 | |
2. Take the bus, and you will get to the university in five ______. 3. All of the children had a ______ school trip to the mountain. 4. I heard the ______ news that there was an accident on wall street this morning. 5. The river ______ again after the storm yesterday. |