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【单选题】
同步发电机与大电网并联时,首先必须满足的条件是( )
A.
电压相同
B.
相同
C.
电压相位相同
D.
相同
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举一反三
【单选题】蜗杆传动主动件为( )
A.
蜗杆
B.
蜗轮
C.
轮
D.
齿条
查看完整题目与答案
【单选题】听力原文：M: I suppose you must have heard about that great piece of concrete falling onto a car in that terrible accident in South Street yesterday, didn't you, Jane? W: Yes, I saw it in the paper. From a...
A.
There was a traffic accident.
B.
A car was smashed by a falling object.
C.
A car hit someone near the high building.
D.
A driver was lolled in his new car.
查看完整题目与答案
【单选题】下列各项反射活动中,哪一项不属于非条件反射
A.
伤害性刺激可引起肢体出现屈肌反应
B.
听到进食铃声引起唾液分泌增加
C.
低氧引起呼吸加深加快
D.
新生动物的吸吮反射
查看完整题目与答案
【单选题】下列各项反射活动中,哪一项属于条件反射( )
A.
伤害性刺激可引起肢体出现屈肌反应
B.
见到美味食品可引起唾液分泌
C.
低氧可以引起呼吸加深加快
D.
新生儿的吸吮反射
E.
强光照射眼睛瞳孔缩小
查看完整题目与答案
【单选题】下列哪项活动属于条件反射
A.
看到酸梅时唾液分泌
B.
食物进入口腔后引起胃腺分泌
C.
大量饮水尿量增加
D.
寒冷环境下皮肤血管收缩
查看完整题目与答案
【单选题】蜗杆传动主动件为( )。
A.
蜗杆
B.
蜗轮
C.
齿轮
D.
齿条
查看完整题目与答案
【单选题】下列哪项活动属于条件反射? ( )
A.
看到酸梅时引起唾液分泌
B.
食物进入口腔后,引起胃腺分泌
C.
大量饮水后尿量增加
D.
寒冷环境下皮肤血管收缩
查看完整题目与答案
【单选题】下列哪项活动属于条件反射
A.
大量出汗后尿液减少
B.
食物进入口腔后唾液分泌增加
C.
望梅止渴
D.
炎热环境下出汗
查看完整题目与答案
【单选题】下列各项反射活动中,哪一项不属于非条件反射
A.
伤害性刺激可引起肢体出现屈肌反应
B.
见到美味食品可引起唾液分泌
C.
低氧可以引起呼吸加深加快
D.
新生儿的吸吮反射
E.
强光照射眼睛瞳孔缩小
查看完整题目与答案
【单选题】听力原文：M: I suppose you must have heard about that great piece of concrete falling onto a car in that terrible accident in South Street yesterday, didn't you, Jane? W: Yes, I saw it in the paper. From a...
A.
There was a traffic accident.
B.
A car was smashed by a falling object.
C.
A car hit someone near the high building.
D.
A driver was killed in his new car.
查看完整题目与答案
相关题目：
【单选题】蜗杆传动主动件为( )
A.
蜗杆
B.
蜗轮
C.
轮
D.
齿条
查看完整题目与答案
【单选题】听力原文：M: I suppose you must have heard about that great piece of concrete falling onto a car in that terrible accident in South Street yesterday, didn't you, Jane? W: Yes, I saw it in the paper. From a...
A.
There was a traffic accident.
B.
A car was smashed by a falling object.
C.
A car hit someone near the high building.
D.
A driver was lolled in his new car.
查看完整题目与答案
【单选题】下列各项反射活动中,哪一项不属于非条件反射
A.
伤害性刺激可引起肢体出现屈肌反应
B.
听到进食铃声引起唾液分泌增加
C.
低氧引起呼吸加深加快
D.
新生动物的吸吮反射
查看完整题目与答案
【单选题】下列各项反射活动中,哪一项属于条件反射( )
A.
伤害性刺激可引起肢体出现屈肌反应
B.
见到美味食品可引起唾液分泌
C.
低氧可以引起呼吸加深加快
D.
新生儿的吸吮反射
E.
强光照射眼睛瞳孔缩小
查看完整题目与答案
【单选题】下列哪项活动属于条件反射
A.
看到酸梅时唾液分泌
B.
食物进入口腔后引起胃腺分泌
C.
大量饮水尿量增加
D.
寒冷环境下皮肤血管收缩
查看完整题目与答案
【单选题】蜗杆传动主动件为( )。
A.
蜗杆
B.
蜗轮
C.
齿轮
D.
齿条
查看完整题目与答案
【单选题】下列哪项活动属于条件反射? ( )
A.
看到酸梅时引起唾液分泌
B.
食物进入口腔后,引起胃腺分泌
C.
大量饮水后尿量增加
D.
寒冷环境下皮肤血管收缩
查看完整题目与答案
【单选题】下列哪项活动属于条件反射
A.
大量出汗后尿液减少
B.
食物进入口腔后唾液分泌增加
C.
望梅止渴
D.
炎热环境下出汗
查看完整题目与答案
【单选题】下列各项反射活动中,哪一项不属于非条件反射
A.
伤害性刺激可引起肢体出现屈肌反应
B.
见到美味食品可引起唾液分泌
C.
低氧可以引起呼吸加深加快
D.
新生儿的吸吮反射
E.
强光照射眼睛瞳孔缩小
查看完整题目与答案
【单选题】听力原文：M: I suppose you must have heard about that great piece of concrete falling onto a car in that terrible accident in South Street yesterday, didn't you, Jane? W: Yes, I saw it in the paper. From a...
A.
There was a traffic accident.
B.
A car was smashed by a falling object.
C.
A car hit someone near the high building.
D.
A driver was killed in his new car.
查看完整题目与答案