更多“晶体三极管工作在饱和区时，发射结处于___ 偏置 ，”相关的问题
糖化血清蛋白测定可反映下列哪个时间段的机体血糖平均水平
A．6～7周
B．4～5周
C．2～3周
D．8～9周
E．10～14周
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使用钻床工作结束后，应将横臂降至（）位置，主轴箱应靠近立柱停放，并且都要夹紧。
A . 最高
B . 最低
C . 极限
D . 死点
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下列高压管件中，（）用于管子与带法兰的附件和设备的连接。
A．高压螺纹管丝头
B．焊接三通
C．弯头
D．异径管
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6个月的惊厥婴儿，应用鲁米那的负荷量为（）
A.5~10mg／kg
B.10~15mg／kg
C.5~10mg／次
D.10~20mg／次
E.20~30mg／次
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职工在（ ）时可以提取公积金。
A.退休 B.辞职 C.出国 D.在职期间死亡 E.房租超出家庭工资收入规定比例
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根据《产品质量法》，国家对产品质量实行以抽查为主要方式的监督检查制度，以下哪项不是该法规定的抽查对象（）。
A. 对可能危及人体健康和人身、财产安全的产品B. 影响国计民生的重要工业产品C. 消费者、有关组织反映有质量问题的产品D. 工业产品生产许可证产品
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World Crude Oil Production May Peak Decade Earlier Than Some Predict In a finding that may speed ef...Which of the following is closest in meaning to the word "sparked" appearing in paragraph 2
A．flashed
B．stimulated
C．changed
D．ended
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六种常见有毒气体有一氧化碳、氯气、氨气、光气、（）和二氧化氮。
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中餐席间服务时，待客人将餐具中的食物吃完或餐碟里盛装三分之一残渣时，及时撤换餐具。
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烟花爆竹工厂当工作间内的危险品对撞击、摩擦特别敏感时，应采用（）。
A.不发生火花的柔性地面 B.不发生火花的地面 C.石头地面
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气体吸收是用适当的液体吸收剂来吸收气体或气体混合物中某种组分的一种操作过程。
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The most important economic activity in Canada is
A．mining.
B．fishing.
C．farming.
D．manufacturing.
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Once upon a time there was a man who had fifty red nightcaps to sell at a fair. His wife put them into a great bag for him which he carried over his shoulder. It was a very hot day. Now the man’s way lay through a wood. When he came to the shade, he put down his bag and sat down to rest. Soon he took one of the red nightcaps out of his bag, put it on, lay down and went to sleep. Now there were monkeys in that wood, and by and by a big old ape came stealing down out of the trees and took one of the red nightcaps out of the bag, put it on his head, and ran up into a tree and sat there grinning and chattering. By and by another ape came stealing down and he too took a red nightcap, put it on and ran up into a tree and he too sat in the tree grinning and chattering. Then another ape took another cap, and then another, until at last there were forty nine monkeys in forty nine red nightcaps, sitting in the trees chattering and calling out.
A．they live in the woodB．they like the caps very muchC．they copied from the man
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