在自动调节系统中,把需要调节的工艺设备的有关部分称为()。
A.给定值
B.调节参数
C.被调参数
D.调节对象
参考答案:D
Though it is difficult, I ______ him find a job, which made him very pleased.
A.tried to help
B.managed to help
C.tried helping
D.succeeded to help
在80g水中加入20g矿石,其液固比为()。
A.0.2
B.0.25
C.4