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问题
判断题
当机器达到所设定的切割次数时,便产生一对脉冲信号,使气路系统中的电磁阀动作。
答案
参考答案:错
选择题
You can't find him. He usually _____ at 4:00.
A have an English lesson
B. is having an English lesson
C. will go to the guitar lesson
D. goes to the guitar lesson
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填空题
以鸡片、鱼片、笋片制成的“糟溜三白”,采用的是______相配的方法。
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