解不等式:2x-3≤1.
移项,得2x≤3+1,
即2x≤4,
解得:x≤2.
解释电机全压启动及其优缺点是什么?
— Did you see the manager in his office?
—Yes, he ______ by the journalist from Chongqing Evening.
A.has been interviewed
B.is being interviewed
C.had been interviewed
D.was being interviewed