工作压力为5MPa的压力容器属于( )。
A.低压容器
B.中低压容器
C.中压容器
D.高压容器
参考答案:C
解析: 工作压力为5MPa的压力容器属于中压容器。
—I paid him 200 yuan for the sneakers.
—Oh, he charged you too much. You _________ them with half the money.
A.could have bought
B.needn’t have bought
C.must have bought
D.wouldn’t have bought
3/2断路器接线有何优、缺点?