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【单选题】
下列说法中,不正确的是(-----)
A.
铁壳开关安装时外壳必须可靠接地
B.
热继电器的双金属片弯曲的速度与电流大小有关,电流越大,速度越大,这种特性称正比时限特性
C.
速度继电器主要用于电动机的反接剧动,所以也称为反接制动继电器
D.
低压配电屏是按一定的接线方案将有关低压一,二次设备组装起来,每一个主电路方案对应一个或多个辅助方案,从而简化了工程设计
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参考答案：
举一反三
【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...
A.
He showed no interested in it.
B.
He thought highly of it.
C.
He didn't agree with it.
D.
He complained about it.
查看完整题目与答案
【单选题】营养师制定含有瘦肉、蛋黄、猪肝、黑木耳的菜谱适合哪种血液病患者
A.
急性白血病
B.
缺铁性贫血
C.
再生障碍性贫血
D.
特发性血小板减少性紫癜
E.
过敏性紫癜
查看完整题目与答案
【判断题】直流发电机正常运行时,主磁通既交链电枢绕组,又交链励磁绕组,因此主磁通在这两个绕组中均感应电动势。
A.
正确
B.
错误
查看完整题目与答案
【单选题】营养师制定含有瘦肉、蛋黄、猪肝、黑木耳的菜谱适合哪种血液病患者（ ）。【历年考试真题】
A.
急性白血病
B.
缺铁性贫血
C.
再生障碍性贫血
D.
特发性血小板减少性紫癜
E.
过敏性紫癜
查看完整题目与答案
【单选题】135照相机中,标准镜头的焦距是____毫 米。
A.
40-58mm
B.
75-80mm
C.
90-127mm
查看完整题目与答案
【判断题】直流发电机正常运行时,由于主磁通既交链电枢绕组又交链励磁绕组,因此主磁通在这两个绕组中均感应电动势。
A.
正确
B.
错误
查看完整题目与答案
【判断题】135照相机的 “标准”镜头都是50mm镜头。
A.
正确
B.
错误
查看完整题目与答案
【判断题】活塞缸和柱塞缸的缸筒内壁均须进行精加工。
A.
正确
B.
错误
查看完整题目与答案
【单选题】B Smog( 雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with...
A.
Wear a mask.
B.
Think of ways to beat it.
C.
Find out what has caused it.
D.
Take a documentary.
查看完整题目与答案
【单选题】135照相机的标准镜头是( )mm。
A.
20
B.
50
C.
70
D.
90
查看完整题目与答案
相关题目：
【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...
A.
He showed no interested in it.
B.
He thought highly of it.
C.
He didn't agree with it.
D.
He complained about it.
查看完整题目与答案
【单选题】营养师制定含有瘦肉、蛋黄、猪肝、黑木耳的菜谱适合哪种血液病患者
A.
急性白血病
B.
缺铁性贫血
C.
再生障碍性贫血
D.
特发性血小板减少性紫癜
E.
过敏性紫癜
查看完整题目与答案
【判断题】直流发电机正常运行时,主磁通既交链电枢绕组,又交链励磁绕组,因此主磁通在这两个绕组中均感应电动势。
A.
正确
B.
错误
查看完整题目与答案
【单选题】营养师制定含有瘦肉、蛋黄、猪肝、黑木耳的菜谱适合哪种血液病患者（ ）。【历年考试真题】
A.
急性白血病
B.
缺铁性贫血
C.
再生障碍性贫血
D.
特发性血小板减少性紫癜
E.
过敏性紫癜
查看完整题目与答案
【单选题】135照相机中,标准镜头的焦距是____毫 米。
A.
40-58mm
B.
75-80mm
C.
90-127mm
查看完整题目与答案
【判断题】直流发电机正常运行时,由于主磁通既交链电枢绕组又交链励磁绕组,因此主磁通在这两个绕组中均感应电动势。
A.
正确
B.
错误
查看完整题目与答案
【判断题】135照相机的 “标准”镜头都是50mm镜头。
A.
正确
B.
错误
查看完整题目与答案
【判断题】活塞缸和柱塞缸的缸筒内壁均须进行精加工。
A.
正确
B.
错误
查看完整题目与答案
【单选题】B Smog( 雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with...
A.
Wear a mask.
B.
Think of ways to beat it.
C.
Find out what has caused it.
D.
Take a documentary.
查看完整题目与答案
【单选题】135照相机的标准镜头是( )mm。
A.
20
B.
50
C.
70
D.
90
查看完整题目与答案
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