当三阀组的平衡阀出现泄露时,差压变送器指示()。
A、偏低
B、偏高
C、不变
D、无法判断
参考答案:A
等高线图中等高线弯曲部分向高处凸出的为山谷,那么图中表示山谷的是( )
A.A处
B.B处
C.C处
D.D处
(2013·辽宁高考)Harry is feeling uncomfortable.He ________ too much at the party last night.
A.could drink
B.should drink
C.would have drunk
D.must have drunk