聚酯装置一般调节()来调节齿轮泵的流量。
A、出口阀
B、转数
C、入口阀
D、压力
参考答案:B
直线l:(x+3)/2=(y+4)/1=z/3与平面π:4x-2y-2z=3的位置关系为:()
A.相互平行
B.L在π上
C.垂直相交
D.相交但不垂直
He has been fired and will have to _______ charge of his office tomorrow.
A.take over
B.hand over
C.get over
D.go over