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【简答题】
一从动齿轮，用20CrMnTi钢制造，使用一段时间后严重磨损，齿已磨光，见图3.6.2。从齿轮A、B、C三点取样进行化学、金相和硬度分析，结果如下： A点：碳含量1.0%，组织：S+碳化物，硬度30HRC； B点：碳含量0.8%，组织：S，硬度26HRC； C点：碳含量0.2%，组织：F+S，硬度86HRB； 据查，齿轮的制造工艺是：锻造→正火→机加工→渗碳→预冷淬火→低温回火→磨加工，并且与该齿轮同批加工的其他齿轮没有这种情况。试分析该齿轮失效的原因。
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【单选题】听力原文：W: This room is filled with smoke. I can hardly breathe. M: I agree. Smoking should not be permitted in this room at all. Q: What can be concluded from this conversation? (16)
A.
The room is on fire.
B.
The men are bothered by the smoke.
C.
There is very little breeze.
D.
The men are not permitted in the room.
【单选题】关于气管前间隙说法不对的一项是( )
A.
位于胸部大血管和气管之间，向上与颈部的气管前间隙相连续，向下达气管隆嵴平面
B.
此间隙在主动脉弓平面和主动脉肺动脉窗平面最大
C.
其左侧即为主动脉肺动脉窗间隙
D.
间隙内有奇静脉弓淋巴结和心包上隐窝
E.
在主动脉弓横断层面此间隙的气管前淋巴结仅有2个，且出现率为100%
【单选题】The room ____ voices of the children.
A.
filled with
B.
was filled with
C.
full of
D.
was full with
【单选题】听力原文：W: This room is filled with smoke. I can't even breathe. M: I'm sorry. I didn't see the sign. Q: What is the man going to do? (4)
A.
Give up smoking forever.
B.
Read the sign carefully.
C.
Open the windows.
D.
Put out his cigarette.
【单选题】关于气管前间隙说法不对的一项是
A.
位于胸部大血管和气管之间，向上与颈部的气管前间隙相连续，向下达气管隆嵴平面
B.
此间隙在主动脉弓平面和主动脉肺动脉窗平面最大
C.
其左侧即为主动脉肺动脉窗间隙
D.
间隙内有奇静脉弓淋巴结和心包上隐窝
E.
在主动脉弓横断层此间隙的气管前淋巴结仅有2个，且出现率为100%
【单选题】The room was filled with the scent, of flowers.
A.
atmosphere
B.
pot
C.
feature
D.
odor
【单选题】When computer crime takes place in a room filled with people, there are usually many witnesses to the crime.
A.
Y
B.
N
C.
NG
【单选题】听力原文：W: The room is filled with smoke, I can hardly breathe. M: I agree, smoking shouldn't be permitted in this room. Q: What can be concluded from this conversation? (18)
A.
There is little breeze.
B.
The room is on fire.
C.
The man is bothered by the smoke.
D.
Women are not permitted in this room.
【单选题】关于气管前间隙说法不对的一项是( )
A.
位于胸部大血管和气管之间，向上与颈部的气管前间隙相连续，向下达气管隆嵴平面
B.
此间隙在主动脉弓平面和主动脉肺动脉窗平面最大
C.
其左侧即为主动脉肺动脉窗间隙
D.
间隙内有奇静脉弓淋巴结和心包上隐窝
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