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【单选题】
下列化合物进行硝化反应容易的是
A.
氯苯
B.
硝基苯
C.
乙苯
D.
苯腈
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参考答案：
举一反三
【单选题】听力原文： Nearly 400 years ago a young man traveled up to London. The young man had come on foot from Stradfurd-on-Avon, a small town on the Avon. He was poor, but he had confidence in his future, the fut...
A.
Because he wanted to be a great actor.
B.
Because he wanted to be a playwright.
C.
Because he was too poor to live on.
D.
Because he wanted to take care of horses.
查看完整题目与答案
【单选题】Everybody had a (an) ___________ that she was a good match for the young man.
A.
attitude
B.
impression
C.
imagination
D.
memory
查看完整题目与答案
【判断题】切削加工中.使用切削液可以提高刀具耐用度但不能提高刀具的使用寿命。
A.
正确
B.
错误
查看完整题目与答案
【单选题】The young man, who had rushed into the fire to save the old man, _____ rewarding.
A.
reserved
B.
deserved
C.
preserved
D.
deserted
查看完整题目与答案
【判断题】( )定期检查、清洗润滑系统、添加或更换油脂油液,使丝杆、导轨等运动部件保持良好
A.
正确
B.
错误
查看完整题目与答案
【判断题】定期检查、清洗润滑系统、添加或更换油脂油液,使丝杆、导轨等运动部件保持良好的润滑状态,目的是降低机械的磨损
A.
正确
B.
错误
查看完整题目与答案
【简答题】The man used to ___________ upearly had his leg broken. A.getting  B. get  C. got  D. have got
查看完整题目与答案
【单选题】切削时使用(    )可提高刀具寿命。
A.
润滑液    
B.
冷却液    
C.
防锈液    
D.
清洗液
查看完整题目与答案
【多选题】正品大黄的来源有
A.
掌叶大黄
B.
唐古特大黄
C.
河套大黄
D.
天山大黄
E.
药用大黄
查看完整题目与答案
【单选题】当( )时,可提高刀具寿命。
A.
主偏角大
B.
材料强度高
C.
高速切削
D.
使用冷却液
查看完整题目与答案
相关题目：
【单选题】听力原文： Nearly 400 years ago a young man traveled up to London. The young man had come on foot from Stradfurd-on-Avon, a small town on the Avon. He was poor, but he had confidence in his future, the fut...
A.
Because he wanted to be a great actor.
B.
Because he wanted to be a playwright.
C.
Because he was too poor to live on.
D.
Because he wanted to take care of horses.
查看完整题目与答案
【单选题】Everybody had a (an) ___________ that she was a good match for the young man.
A.
attitude
B.
impression
C.
imagination
D.
memory
查看完整题目与答案
【判断题】切削加工中.使用切削液可以提高刀具耐用度但不能提高刀具的使用寿命。
A.
正确
B.
错误
查看完整题目与答案
【单选题】The young man, who had rushed into the fire to save the old man, _____ rewarding.
A.
reserved
B.
deserved
C.
preserved
D.
deserted
查看完整题目与答案
【判断题】( )定期检查、清洗润滑系统、添加或更换油脂油液,使丝杆、导轨等运动部件保持良好
A.
正确
B.
错误
查看完整题目与答案
【判断题】定期检查、清洗润滑系统、添加或更换油脂油液,使丝杆、导轨等运动部件保持良好的润滑状态,目的是降低机械的磨损
A.
正确
B.
错误
查看完整题目与答案
【简答题】The man used to ___________ upearly had his leg broken. A.getting  B. get  C. got  D. have got
查看完整题目与答案
【单选题】切削时使用(    )可提高刀具寿命。
A.
润滑液    
B.
冷却液    
C.
防锈液    
D.
清洗液
查看完整题目与答案
【多选题】正品大黄的来源有
A.
掌叶大黄
B.
唐古特大黄
C.
河套大黄
D.
天山大黄
E.
药用大黄
查看完整题目与答案
【单选题】当( )时,可提高刀具寿命。
A.
主偏角大
B.
材料强度高
C.
高速切削
D.
使用冷却液
查看完整题目与答案
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