题目内容

篦式冷却机的篦床传动主要由()和()两种方式。

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惊厥表现为持续性强直性痉挛伴肌肉剧烈疼痛常见于()

A. 癫痫
B. 破伤风
C. 蛛网膜下腔出血
D. 高血压脑病
E. 脑肿瘤

A环芳构化,母体位雌甾烷,C19无甲基,C3无羟基的是()

A. 雌二醇
B. 炔雌醇
C. 黄体酮
D. 睾酮
E. 米非司酮

Forty-five fathoms is marked on the anchor chain by().

A. one turn of wire on the first stud from each side of the detachable link
B. two turns of wire on the second stud from each side of the detachable link
C. three turns of wire on the third stud from each side of the detachable link
D. four turns of wire on the fourth stud from each side of the detachable link

XT-12通井机的滚筒在低速挡时,快绳最大拉力是()kN。

A. 94.64
B. 104.64
C. 114.64
D. 124.64

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