KM型压滤机由（）控制电路，实现压紧油缸工作。
A、压力继电器
B、液控单向阀
C、调速阀
D、电磁阀
参考答案：A
With everything needed________, she went out of the shop, with her hands full of shopping bags. [ ]
A. bought
B. buy
C. to buy
D. buying
毛果芸香碱可引起
A．眼内压下降B．休克C．重症肌无力患者肌张力增加D．流涎、震颤和肌肉强直症状缓解E．肌肉松弛
