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【简答题】
交直流伺服电机一般用于 、 控制系统。
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】There was a big fire in the building last night. ____, all the people were able to escape.
A.
Unluckily
B.
Fortunately
C.
To be sure
D.
Above all
【单选题】A big bush fire ___ in Australia last night, but fortunately everyone ____escape. [ ]
A.
took place; could
B.
happened; can
C.
broke out; was able to
D.
happened; could
【简答题】游戏开发的基本流程:
【简答题】药物疗效不佳，呈自限性（ ）。
【单选题】A big party was held in NO.18 Middle School last night, the teacher with students _____ singing and dancing happily at the party.
A.
is
B.
was
C.
are
D.
were
【单选题】莫非氏滴管液面过高,正确处理是:
A.
移动病人输液侧肢体
B.
夹住滴管上端的输液管，打开调节孔，使液面下降
C.
夹住滴管下端的输液管，打开调节孔，使液面下降
D.
夹住滴管上端的输液管，挤压莫非氏滴管，使液面下降
E.
夹住滴管下端的输液管，挤压莫非氏滴管，使液面下降
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