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【单选题】
牛胚胎移植试验的主要流程如图,下列相关叙述正确的是( )1供体超数排卵→2配种→3胚胎收集→4______→5胚胎移植→子代小牛。
A.
①过程需要是注射有关激素,目的是获得更多的卵原细胞并完成减数分裂
B.
③过程是以哺乳动物早期胚胎与子宫建立了组织上的联系为前提
C.
④过程是“对胚胎进行质量检查”,可移植的胚胎应发育到囊胚或原肠胚
D.
⑤过程成功率的高低主要决定于供、受体生理状况的一致性
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【判断题】In the use of sources, we need to keep direct quotation to the minimum.
A.
正确
B.
错误
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【多选题】自然地理环境由四个基本地圈构成,分别是()、()、()和()。
A.
对流圈
B.
水圈
C.
沉积岩石圈
D.
生物圈
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【单选题】Wilson: Are you feeling any better today? I hear you got the flu. Jim:______.
A.
I'm afraid not. I feel worse.
B.
Yes, I got the flu.
C.
I feel good today.
D.
No, I've been in bed for nearly a week.
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【单选题】The use of transformer oil in a minimum-oil circuit breaker is ()
A.
to quench the arc and establish an insulated break between the contacts.
B.
to quench the arc and build insulation between the arc-quenching chamber and ground
C.
to establish an insulated break between the contacts and build insulation between the arc-quenching chamber and ground.
D.
to protect the circuit breaker from firing
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【单选题】The wear of two metal surfaces can be reduced to minimum by use of ______.
A.
a suitable lubricant
B.
a proper coolant
C.
a sealing agent
D.
a hydraulic fluid
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【单选题】— What's the _____, John? — I have got the flu. [ ]
A.
weather
B.
matter
C.
wrong
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【单选题】By regulation,you MUST keep a record of the use of your radiotelephone for a minimum of().
A.
six months
B.
one year
C.
two years
D.
thirty months
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【多选题】哪些方面的课程可能是电气工程专业需要学习的?
A.
数学方面的课程
B.
语言学
C.
电路
D.
磁路
E.
电器设备如洗衣机,电磁炉
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【简答题】自然地理环境由 、 、 和 四个基本地圈组成。
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【单选题】-I'm afraid I've got terrible flu. -( ).A: Never mindB: Keep away from meC: You&
A.
-I'm afraid I've got terrible flu. -( ). A: Never mind
B.
Keep away from me
C.
You'd better go and see a doctor
D.
You need to be more careful
查看完整题目与答案
相关题目:
【判断题】In the use of sources, we need to keep direct quotation to the minimum.
A.
正确
B.
错误
查看完整题目与答案
【多选题】自然地理环境由四个基本地圈构成,分别是()、()、()和()。
A.
对流圈
B.
水圈
C.
沉积岩石圈
D.
生物圈
查看完整题目与答案
【单选题】Wilson: Are you feeling any better today? I hear you got the flu. Jim:______.
A.
I'm afraid not. I feel worse.
B.
Yes, I got the flu.
C.
I feel good today.
D.
No, I've been in bed for nearly a week.
查看完整题目与答案
【单选题】The use of transformer oil in a minimum-oil circuit breaker is ()
A.
to quench the arc and establish an insulated break between the contacts.
B.
to quench the arc and build insulation between the arc-quenching chamber and ground
C.
to establish an insulated break between the contacts and build insulation between the arc-quenching chamber and ground.
D.
to protect the circuit breaker from firing
查看完整题目与答案
【单选题】The wear of two metal surfaces can be reduced to minimum by use of ______.
A.
a suitable lubricant
B.
a proper coolant
C.
a sealing agent
D.
a hydraulic fluid
查看完整题目与答案
【单选题】— What's the _____, John? — I have got the flu. [ ]
A.
weather
B.
matter
C.
wrong
查看完整题目与答案
【单选题】By regulation,you MUST keep a record of the use of your radiotelephone for a minimum of().
A.
six months
B.
one year
C.
two years
D.
thirty months
查看完整题目与答案
【多选题】哪些方面的课程可能是电气工程专业需要学习的?
A.
数学方面的课程
B.
语言学
C.
电路
D.
磁路
E.
电器设备如洗衣机,电磁炉
查看完整题目与答案
【简答题】自然地理环境由 、 、 和 四个基本地圈组成。
查看完整题目与答案
【单选题】-I'm afraid I've got terrible flu. -( ).A: Never mindB: Keep away from meC: You&
A.
-I'm afraid I've got terrible flu. -( ). A: Never mind
B.
Keep away from me
C.
You'd better go and see a doctor
D.
You need to be more careful
查看完整题目与答案