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【单选题】
若 R 1 为电桥工作臂, R 2、 R3、R4为非工作臂,且R1=R2=R3=R4,供桥电压为e0,工作时R1变化为R1±△R1,则该电桥的灵敏度为:( B )
A.
e0 /2
B.
e0 /4
C.
△R1/4R1
D.
e0 /4R1
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参考答案：
举一反三
【单选题】Mary set up an organization to help us with the study.
A.
操作员
B.
组织
C.
经营者
查看完整题目与答案
【单选题】关于正常妊娠的生理改变,下列正确的是
A.
皮质醇降低
B.
醛固酮降低
C.
甲状腺激素降低
D.
血浆蛋白降低
E.
促性腺激素增加
查看完整题目与答案
【单选题】Mary and Joan quarreled, but they          after a while．
A.
put up
B.
brought up
C.
made up
D.
set up
查看完整题目与答案
【单选题】下列哪项是正常妊娠的生理改变
A.
皮质醇降低
B.
醛固酮降低
C.
血浆白蛋白降低
D.
促性腺激素增加
E.
甲状腺素降低
查看完整题目与答案
【单选题】Mary set up an organization to help us with the study.
A.
组织
B.
经营者
C.
操作员
查看完整题目与答案
【单选题】Mary has _______ a difficult question to me.
A.
put
B.
asked
C.
made up
D.
set
查看完整题目与答案
【单选题】What does Mary Unger say she will do?
A.
Set up the equipment by herself
B.
Arrive 30 minutes early on Thursday
C.
Make copies of her presentation materials
D.
E-mail the presentation schedule later that day
查看完整题目与答案
【单选题】下列这首唐诗的顺序已打乱，请选出诗中的颈联和颔联。①出师未捷身先死 ②映阶碧草白春色③两朝开济老臣心 ④锦官城外柏森森⑤隔叶黄鹂空好音 ⑥丞相祠堂何处寻⑦三顾频烦天下计 ⑧长使英雄泪满襟以上诗句中颔联为——句和——句；颈联为——句和——句。
A.
①⑧，④⑥
B.
④⑥，⑦③
C.
②⑤，①⑧
D.
②⑤，⑦③
查看完整题目与答案
【单选题】正常妊娠血液循环系统的生理改变是
A.
血浆蛋白含量降低
B.
血沉减慢
C.
红细胞总数减少
D.
纤维蛋白原含量降低
E.
白细胞总数减少
查看完整题目与答案
【单选题】______ that Mary was able to set up new branches everywhere. [    ]
A.
So successful her business was
B.
So successful was her business
C.
So her business was successful
D.
So was her successful business
查看完整题目与答案
相关题目：
【单选题】Mary set up an organization to help us with the study.
A.
操作员
B.
组织
C.
经营者
查看完整题目与答案
【单选题】关于正常妊娠的生理改变,下列正确的是
A.
皮质醇降低
B.
醛固酮降低
C.
甲状腺激素降低
D.
血浆蛋白降低
E.
促性腺激素增加
查看完整题目与答案
【单选题】Mary and Joan quarreled, but they          after a while．
A.
put up
B.
brought up
C.
made up
D.
set up
查看完整题目与答案
【单选题】下列哪项是正常妊娠的生理改变
A.
皮质醇降低
B.
醛固酮降低
C.
血浆白蛋白降低
D.
促性腺激素增加
E.
甲状腺素降低
查看完整题目与答案
【单选题】Mary set up an organization to help us with the study.
A.
组织
B.
经营者
C.
操作员
查看完整题目与答案
【单选题】Mary has _______ a difficult question to me.
A.
put
B.
asked
C.
made up
D.
set
查看完整题目与答案
【单选题】What does Mary Unger say she will do?
A.
Set up the equipment by herself
B.
Arrive 30 minutes early on Thursday
C.
Make copies of her presentation materials
D.
E-mail the presentation schedule later that day
查看完整题目与答案
【单选题】下列这首唐诗的顺序已打乱，请选出诗中的颈联和颔联。①出师未捷身先死 ②映阶碧草白春色③两朝开济老臣心 ④锦官城外柏森森⑤隔叶黄鹂空好音 ⑥丞相祠堂何处寻⑦三顾频烦天下计 ⑧长使英雄泪满襟以上诗句中颔联为——句和——句；颈联为——句和——句。
A.
①⑧，④⑥
B.
④⑥，⑦③
C.
②⑤，①⑧
D.
②⑤，⑦③
查看完整题目与答案
【单选题】正常妊娠血液循环系统的生理改变是
A.
血浆蛋白含量降低
B.
血沉减慢
C.
红细胞总数减少
D.
纤维蛋白原含量降低
E.
白细胞总数减少
查看完整题目与答案
【单选题】______ that Mary was able to set up new branches everywhere. [    ]
A.
So successful her business was
B.
So successful was her business
C.
So her business was successful
D.
So was her successful business
查看完整题目与答案
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