丙烯吸收塔（C-101）塔顶控制压力为（）MPa.
A.1.00
B.1.05
C.0.85
D.0.90
参考答案：A
我国电力工业的标准频率是（）。
A、50Hz
B、60Hz
C、65Hz
D、70Hz
He（）driving me home, even though I told him I lived nearby
A.insisted on
B.insisted at
C.insisted that
D.insisted in
