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【单选题】
配制100 mL0.5mol/L EDTA(pH8.0) 溶液,需要称量EDTA的量是
A.
18.61g
B.
146.12g
C.
73.06g
D.
14.612g
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【单选题】Before Sept. 11, the U.S. Congress had been unable to pass stricter immigration laws because.
A.
they might have kept away foreign students and cheap labor
B.
it was difficult to coordinate the efforts of the congressmen
C.
education and business circles cared little about national security
D.
resources were not available for their enforcement
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【多选题】U.S. laws requiring that drivers wear seat belts have resulted in
A.
a reduction in both driver deaths and pedestrian deaths.
B.
fewer accidents and fewer deaths per accident.
C.
fewer driver deaths, fewer accidents and fewer pedestrian deaths.
D.
little change in the number of driver deaths, but more accidents.
E.
an increase in the number of accidents.
F.
safer driving.
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【单选题】The mining industry in the U.S. became safer after the late 1960s because
A.
the U.S. Senate passed laws requiring federal mine inspections.
B.
the U.S. Congress passed laws requiring federal mine inspections.
C.
the U.S. health and safety officials passed laws requiring federal mine inspections.
D.
the U.S, mine companies passed laws requiring federal mine inspections.
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【判断题】配种后母畜不发情的时间越长,不再发情率越接近实际受胎率。
A.
正确
B.
错误
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【单选题】Before Sept.11, the U.S. Congress had been unable to pass stricter immigration laws because ________.
A.
education and business circles cared little about national security
B.
resources were not available for their enforcement
C.
it was difficult to coordinate the efforts of the congressmen
D.
they might have kept away foreign students and cheap labor
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【单选题】In 1642 and 1647, the Bay Colony passed laws requiring all parents to provide _____ education for their children.
A.
writing
B.
speaking
C.
reading
D.
listening
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【单选题】Why are there laws made against smoking in public places in the U.S.?
A.
Because people have realized the danger of second-hand smoke.
B.
Because more and more people don't like smoking now.
C.
Because parents don't want their children to become smokers.
D.
Because the government wants to limit the production of cigarettes.
查看完整题目与答案
【单选题】Before Sept 11, the U.S. Congress had been unable to pass stricter immigration laws be- cause______.
A.
they might have kept away foreign students and cheap labor.
B.
it was difficult to coordinate the efforts of the congressmen.
C.
education and business circles cared little about nation.
D.
resources were not available for their enforcement.
查看完整题目与答案
【单选题】Laws requiring computer companies to pay for recycling their products have been passed for the purpose of ( )
A.
urging them to design upgradeable equipment
B.
cutting down their costs of production
C.
reducing the number of computers to be produced
D.
encouraging them to advertise their products
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【单选题】Game laws in every state of the U.S. regulate the raising of wild game.
A.
Y
B.
N
C.
NG
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相关题目：
【单选题】Before Sept. 11, the U.S. Congress had been unable to pass stricter immigration laws because.
A.
they might have kept away foreign students and cheap labor
B.
it was difficult to coordinate the efforts of the congressmen
C.
education and business circles cared little about national security
D.
resources were not available for their enforcement
查看完整题目与答案
【多选题】U.S. laws requiring that drivers wear seat belts have resulted in
A.
a reduction in both driver deaths and pedestrian deaths.
B.
fewer accidents and fewer deaths per accident.
C.
fewer driver deaths, fewer accidents and fewer pedestrian deaths.
D.
little change in the number of driver deaths, but more accidents.
E.
an increase in the number of accidents.
F.
safer driving.
查看完整题目与答案
【单选题】The mining industry in the U.S. became safer after the late 1960s because
A.
the U.S. Senate passed laws requiring federal mine inspections.
B.
the U.S. Congress passed laws requiring federal mine inspections.
C.
the U.S. health and safety officials passed laws requiring federal mine inspections.
D.
the U.S, mine companies passed laws requiring federal mine inspections.
查看完整题目与答案
【判断题】配种后母畜不发情的时间越长,不再发情率越接近实际受胎率。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Before Sept.11, the U.S. Congress had been unable to pass stricter immigration laws because ________.
A.
education and business circles cared little about national security
B.
resources were not available for their enforcement
C.
it was difficult to coordinate the efforts of the congressmen
D.
they might have kept away foreign students and cheap labor
查看完整题目与答案
【单选题】In 1642 and 1647, the Bay Colony passed laws requiring all parents to provide _____ education for their children.
A.
writing
B.
speaking
C.
reading
D.
listening
查看完整题目与答案
【单选题】Why are there laws made against smoking in public places in the U.S.?
A.
Because people have realized the danger of second-hand smoke.
B.
Because more and more people don't like smoking now.
C.
Because parents don't want their children to become smokers.
D.
Because the government wants to limit the production of cigarettes.
查看完整题目与答案
【单选题】Before Sept 11, the U.S. Congress had been unable to pass stricter immigration laws be- cause______.
A.
they might have kept away foreign students and cheap labor.
B.
it was difficult to coordinate the efforts of the congressmen.
C.
education and business circles cared little about nation.
D.
resources were not available for their enforcement.
查看完整题目与答案
【单选题】Laws requiring computer companies to pay for recycling their products have been passed for the purpose of ( )
A.
urging them to design upgradeable equipment
B.
cutting down their costs of production
C.
reducing the number of computers to be produced
D.
encouraging them to advertise their products
查看完整题目与答案
【单选题】Game laws in every state of the U.S. regulate the raising of wild game.
A.
Y
B.
N
C.
NG
查看完整题目与答案