液面压力和液体种类一定时,液体内任一点的压力大小只决定于(),液柱式测压计正是利用此原理工作的。 ["该点所在液深","液面位置","液体密度","水银密度"]
A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the () (1) MEP is lower and the scavenging air is cooling the exhaust gases (2) valve overlap in a four-stroke ["(1) only is correct","(2) only is correct","both (1) and (2) are correct","Neither (1) or (2) are correct"]
70年代末和80年代初的政府改革,增加了国家在社会和环境计划的执行过程中对地方政府的依赖性。
命令bandwidth的作用,下列说法正确的是()。1.可以重新设置带宽2.被路由选择协议用来计算路由开销 ["A.1","B.2","C.1,2","D.1,2都不是"]
参议院可以以三分之二的投票推翻众议院关于立法方面的决议。
简述镰刀菌病的流行情况。