题目内容

如何用角数字编码器测量转速?

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境外机构、组织、个人实施或者指使、()他人实施的,危害中华人民共和国国家安全的间谍行为,都必须受到法律追究。

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下列哪种剂型一般不适宜小儿口服:()

A. 口服液
B. 颗粒剂
C. 糖浆剂
D. 胶囊剂

Scavenging in a four-stroke/cycle diesel engine occurs during the ().

A. last part of the exhaust stroke, and the first part of the intake stroke
B. last part of the intake stroke only
C. early part of the injection stroke only
D. early part of the power stroke

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