— he like singing? -Yes, he . [ ]
A. Does; does
B. Is; is
C. Does; like
D. Do; do
答案:A
水煤气钢管广泛用在()管道上。
A.低压
B.中压
C.高压
D.真空
控制柜的控制电压()V。
A.220
B.110
C.380
D.400