在冲压设备的安全装置中，拉手式安全防护装置属于( )类型。
A. 按钮式
B. 光电式
C. 感应式
D. 机械式
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Old Reese never wanted to know about his son's studies because ____________.
A. he was sure his son was good at his lessons
B. he spent all his energies on his business
C. he knew nothing about the education
D. his wife looked after their children
如果只使用1分、2分、5分、1角和5角的硬币，小马至少需要有几个硬币才能不找零地支付出任何不超过1元的钱数（）
A. 8
B. 9
C. 10
D. 11
癫痫大发作，首选的治疗药物是
A. 乙琥胺
B. 苯妥英钠
C. 苯巴比妥
D. 硫喷妥钠
E. 卡马西平
下列选项中不属于气瓶安全泄压部件的是( )。
A. 爆破片
B. 易熔塞
C. 安全阀
D. 防震圈
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