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问题 多项选择题

电子控制汽油喷射系统大致可以分为：（）系统三个部分）。

A、空气供给系统

B、执行器

C、燃油系统

D、自我诊断系统

E、信号输入装置

F、微机控制

答案

参考答案：A, C, F

单项选择题

接受清洁手术者，在术前给予抗菌药物的适宜时间是

A．0.5～2小时
B．2～3小时
C．2～4小时
D．3～6小时
E．4～8小时
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单项选择题

A little boy invited his mother to attend his school’s first teacher-parent meeting. To the little boy’s (1) , she said she would go. This (2) be the first time that his classmates and teacher (3) his mother and he felt (4) of her appearance. Although she was a beautiful woman, there was a severe sear (疤痕) that (5) nearly the entire right side of her face. The boy never wanted to (6) why or how she got the sear.At the meeting, the people were (7) by the kindness and natural beauty of his mother (8) the sear, but the little boy was still embarrassed (尴尬) and (9) himself from everyone. He did, however, get within (10) of a conversation between his mother and his teacher.The teacher asked (11) ," How did you get the scar on your face"The mother replied, " (12) my son was a baby, he was in a room that caught fire. Everyone was (13) afraid to go in because the fire was (14) , so I went in. As I was running toward his bed, I saw a long piece of wood coming down and I placed myself over him trying to protect him. I was knocked (15) but fortunately, a fireman came in and saved both of us. " She (16) the burned side of her face. "This scar will be (17) , but to this day, I have never (18) what I did. "At this moment, the little boy came out running toward his mother with tears in his eyes. He held her in his arms and felt a great (19) of the sacrifice (牺牲) that his mother had made for him. He held her hand (20) for the rest of the day.

第（13）空应选择（）

A．so 

B．much 

C．quite 

D．too
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