控制线与动力线共管时，当线路较长或弯头较多时，控制线截面不应小于动力线截面的( )。
A．10% B．15% C．30% D．40%
参考答案：A
4×（X+2）=32．
It was a nice house, but （） too small for a family of live.
A. rarely
B. fairly
C. rather
D. pretty
