油氢差压过高或过低有哪些影响?
参考答案:
当油氢压差过大时,将使一部分密封油流入发电机内。
当油氢压差过小时,将造成漏氢现象。
I do believe that ______ swim across the river, but, in that situation, I ____ do that.
A.am able; couldn’t
B.could; was able to
C.was quite able to; couldn’t
D.couldn’t was able to
城市开发中常提到的“七通一平”,下列不属于“七通”的是()。
A.空气管道
B.排水沟管
C.电信线路
D.道路贯通