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【单选题】
直流电动机如要实现反转,需要对调电枢电源的极性,其励磁电源的极性( )。
A.
保持不变
B.
同时对调
C.
变与不变均可
D.
不确定
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参考解析：
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举一反三
【单选题】If you're the host, you ___________.
A.
must serve the tea in a friendly way
B.
should buy as much food as you can for the party
C.
should prepare some presents for the guests
D.
must serve the same tea to all the guests
查看完整题目与答案
【单选题】关于颅内压增高的临床表现，叙述错误的是（）
A.
头痛在早晨或晚间较重，多位于额部及两颞，性质以胀痛和撕裂痛多见
B.
呕吐常呈喷射状，与进食无关，易发生于饭后，伴或不伴有恶心
C.
视盘水肿早期表现为眼底视网膜静脉扩张、视盘充血，如颅内压增高无改善，可出现视力减退，继发性视神经萎缩，以致失明
D.
单纯的颅内压增高不会引起展神经麻痹及复视
E.
儿童患者头颅叩诊时呈破罐声，可见头皮浅静脉扩张
查看完整题目与答案
【单选题】听力原文：W: I just don't understand how Tom got the job when so many others applied. M: It must have been beginner's luck. Q: Why is the woman puzzled? (3)
A.
Tom applied for a job.
B.
Tom was preferred to others.
C.
Tom wanted other job.
D.
Tom was unlucky.
查看完整题目与答案
【单选题】听力原文：W: I just don't understand how Tom got the job when so many others applied. M: It must have been beginner's luck. Q: Why is the woman puzzled? (2)
A.
Tom applied for a job.
B.
Tom was preferred to others.
C.
Tom wanted other job.
D.
Tom was too unlucky.
查看完整题目与答案
【单选题】两个电容器并联,若C 1 =2C 2 ,则C 1 、C 2 所带电荷量Q 1 、Q 2 的关系是( )。
A.
Q 1 = 2Q 2
B.
2Q 1 = Q 2
C.
Q 1 = Q 2
D.
不能确定
查看完整题目与答案
【单选题】地球为生命诞生和反演提供的最佳条件有()
A.
地球表面多样而又相对稳定的环境条件
B.
具有生命所需的特殊大气层
C.
恰到好处的地壳
D.
以上都是
查看完整题目与答案
【简答题】W:If I were ten years younger, I would have got the job. M:Right. They think young girls can do the job better. ( ) 25. Why didn’t the woman get the job?A. She is not old enough. B. She is not longer ...
查看完整题目与答案
【单选题】两个电容器并联,若 C1 等于 2C2 ,则 C1 、 C2 所带电荷量 q1 、 q2 的关系是()
A.
q1=q2
B.
q1=2q2
C.
q2=2q1
D.
无法确定
查看完整题目与答案
【简答题】根据所给提示填空。 1. If you're s_____________ and you know it, sit and cry. 2. If you're h_____________ and you know it, fan your face. 3. If you're t_____________ and you know it, go to sleep. 4. If you're c...
查看完整题目与答案
【简答题】翻译。 1. You're welcome. _________________________________ 2. Have some juice! _________________________________ 3. I like hot dogs. _________________________________ 4. Smell the coffee. ______________...
查看完整题目与答案
相关题目：
【单选题】If you're the host, you ___________.
A.
must serve the tea in a friendly way
B.
should buy as much food as you can for the party
C.
should prepare some presents for the guests
D.
must serve the same tea to all the guests
查看完整题目与答案
【单选题】关于颅内压增高的临床表现，叙述错误的是（）
A.
头痛在早晨或晚间较重，多位于额部及两颞，性质以胀痛和撕裂痛多见
B.
呕吐常呈喷射状，与进食无关，易发生于饭后，伴或不伴有恶心
C.
视盘水肿早期表现为眼底视网膜静脉扩张、视盘充血，如颅内压增高无改善，可出现视力减退，继发性视神经萎缩，以致失明
D.
单纯的颅内压增高不会引起展神经麻痹及复视
E.
儿童患者头颅叩诊时呈破罐声，可见头皮浅静脉扩张
查看完整题目与答案
【单选题】听力原文：W: I just don't understand how Tom got the job when so many others applied. M: It must have been beginner's luck. Q: Why is the woman puzzled? (3)
A.
Tom applied for a job.
B.
Tom was preferred to others.
C.
Tom wanted other job.
D.
Tom was unlucky.
查看完整题目与答案
【单选题】听力原文：W: I just don't understand how Tom got the job when so many others applied. M: It must have been beginner's luck. Q: Why is the woman puzzled? (2)
A.
Tom applied for a job.
B.
Tom was preferred to others.
C.
Tom wanted other job.
D.
Tom was too unlucky.
查看完整题目与答案
【单选题】两个电容器并联,若C 1 =2C 2 ,则C 1 、C 2 所带电荷量Q 1 、Q 2 的关系是( )。
A.
Q 1 = 2Q 2
B.
2Q 1 = Q 2
C.
Q 1 = Q 2
D.
不能确定
查看完整题目与答案
【单选题】地球为生命诞生和反演提供的最佳条件有()
A.
地球表面多样而又相对稳定的环境条件
B.
具有生命所需的特殊大气层
C.
恰到好处的地壳
D.
以上都是
查看完整题目与答案
【简答题】W:If I were ten years younger, I would have got the job. M:Right. They think young girls can do the job better. ( ) 25. Why didn’t the woman get the job?A. She is not old enough. B. She is not longer ...
查看完整题目与答案
【单选题】两个电容器并联,若 C1 等于 2C2 ,则 C1 、 C2 所带电荷量 q1 、 q2 的关系是()
A.
q1=q2
B.
q1=2q2
C.
q2=2q1
D.
无法确定
查看完整题目与答案
【简答题】根据所给提示填空。 1. If you're s_____________ and you know it, sit and cry. 2. If you're h_____________ and you know it, fan your face. 3. If you're t_____________ and you know it, go to sleep. 4. If you're c...
查看完整题目与答案
【简答题】翻译。 1. You're welcome. _________________________________ 2. Have some juice! _________________________________ 3. I like hot dogs. _________________________________ 4. Smell the coffee. ______________...
查看完整题目与答案