空气进入液压系统后会使系统产生（）等。
A.噪声
B.振动
C.使油液变质
D.工作不平稳以及产生爬行
参考答案：A, B, C, D
It was foolish of him to ____his notes during such an important test, and as a result, he got punished.
A．point to
B．keep to
C．stick to
D．refer to
某女，24岁。肘关节肌肉酸痛重着不移2个月，伴有肿胀，肌肤麻木不仁，阴雨天加重，苔白腻，脉濡缓。针灸治疗除主穴外，应加取（）
A.膈俞、血海
B.曲池、尺泽
C.曲池、大椎
D.肾俞、关元
E.足三里、阴陵泉
