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【简答题】
单词拼写。 1. He always fails exams, for he spends little time making enough p ______ for his examinations. 2. Now the girl is in hospital recovering from liver f_______. 3. There were about 300 students from our school a ______the lecture yesterday. 4. He hurried here i_____ he heard the news. 5. Children are often c ______about everything. They will keep asking questions. 6. As far as I know,this scientist has made quite a few important_____(发现)in this field. 7. The company mainly_____(出版)books for children every year. 8. You should give me a clear______(解释)of your conduct. 9. Some of the students had______(体验)hardships before they entered the university. 10. He told me he was much______(羞愧)of having lied to his mother.
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参考答案:
举一反三
【简答题】有两个含碳量为1.2%的碳钢薄试样,分别加热到780°C和860°C并保同时间,使之达到平衡状态,然后以大于Vk的冷却速度冷至室温,试问: (1)哪个温度加热淬火后马氏体晶粒较粗大?为什么? (2)哪个温度加热淬火后马氏体含碳量较多?为什么? (3)哪个温度加热淬火后残余奥氏体较多?为什么? (4)哪个温度加热淬火后未溶碳化物较少?为什么? (5)你认为哪个温度淬火合适?为什么?
【单选题】We were just about ready to leave _____ it started to snow.
A.
when
B.
before
C.
after
D.
since
【单选题】How lucky! We were just______ for the train.
A.
in time
B.
on time
C.
in no time
【单选题】The books______from the car when we got to the bookstore.
A.
were just unloading
B.
were just being unloaded
C.
had just unloaded
D.
would just been unloaded
【单选题】下列哪件事情不是秦昭王时期范雎做的?
A.
废穰侯
B.
逐华阳
C.
拔三川之地
D.
杜私门
【单选题】We were just about to leave_______ it started to snow.
A.
when      
B.
before     
C.
after      
D.
since
【单选题】AT指令 : AT+CIPSTART=”TCP”,”120.77.58.34”,8600的用途是( )
A.
连接物联网云平台
B.
连接电信云
C.
连接TCP服务器
D.
连接网关
【单选题】The passengers______out of the exit when we arrived at the airport.
A.
were just coming
B.
just came
C.
are just coming
D.
just come
【单选题】“‘攘外安内’蒋主张,夜赠领土百万方,金陵城头发乱令,叫尔小民做羔羊......”,与该歌谣创作背景有关的历史事件是
A.
九一八事变
B.
百团大战
C.
卢沟桥事变
D.
台儿庄战役
【简答题】有两个含碳量为 1.2%的碳钢薄试样,分别加热到780 °C 和 860 °C 并保同时间,使之达到平衡状态,然后以大于 V K 的冷却速度至室温。试问: ( 1)哪个温度加热淬火后马氏体晶粒较粗大? ( 2)哪个温度加热淬火后马氏体含碳量较多? ( 3)哪个温度加热淬火后残余奥氏体较多? ( 4)哪个温度加热淬火后未溶碳化物较少? ( 5)你认为哪个温度加热淬火后合适?为什么?
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