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【判断题】
Rescuers can not switch positions even when there are more than one rescuer.
A.
正确
B.
错误
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【判断题】数字式万用表在电阻档时,红表笔接二极管的正极,黑表笔接二极管的负极,测得的是二极管的正向电阻。
A.
正确
B.
错误
【判断题】数字万用表来测二极管的正向电阻时,红笔接二极管的正极,黑笔接负极。( )
A.
正确
B.
错误
【判断题】用数字式万用表测量二极管的正向电阻时,应将万用表的红表笔接二极管的阳极,黑表笔接二极管的阴极。
A.
正确
B.
错误
【单选题】呕血最常见的病因是(     )
A.
食管出血
B.
食管下端胃底静脉曲张破裂
C.
消化性溃疡出血
D.
急性胃粘膜病变
E.
胆道出血
【单选题】He left the room, _________.
A.
his nose bled, his hands shake
B.
. his nose bled, his hands shaking
C.
his nose bleeding, his hands shake
D.
his nose bleeding, his hands shaking
【单选题】将数字万用表置于二极管测试挡,当红表笔接二极管正极、黑表笔接 二极管的负极时,数字万用表所测得的数值是该二极管的( )
A.
正向导通电阻
B.
反向导通电阻
C.
正向导通电压
D.
反向击穿电压
【单选题】He is a forgetful boy. He often _____ his keys in the room.
A.
forgot
B.
left
C.
leaves
【单选题】______seen me than he left the room.
A.
As soon as he had
B.
Once he had
C.
Hardly had he
D.
No sooner had he
【判断题】用数字式万用表检测二极管时,红表笔接二极管的负极,黑表笔接二极管的正极,此时测得的阻值才是二极管的正向导通电阻。
A.
正确
B.
错误
【单选题】下列艺术家哪一位不是中国人 ( )
A.
画家张择端
B.
画家郑板桥
C.
画家高更
D.
画家齐白石
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