牵引电机超速试验时,使陪试电机转速达到该电机转速的(),持续2min。
A、l.1倍
B、1.2倍
C、1.25倍
D、1.3倍
参考答案:C
The Sinai Peninsula , which was returned to Egypt in 1982 ,is .
A.as three times large as Israel
B.three times large than Israel
C.three times Israel’s size
D.the size of Israel’s three times
数控机床的几何精度是(),常用的检测工具有:()、()、()、()和高精度检验棒等。