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【单选题】
做定轴转动的刚体具有几个自由度?A.
0
B.
1
C.
2
D.
3
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举一反三
【简答题】Good afternoon, ladies and gentlemen! Welcome (1) the luxury cruise train to Canberra, Sydney and Bristane. We are scheduled to arrive in Canberra at (2) this evening. There will be a 20-minute rest s...
【单选题】下列说法正确的是( )
A.
乙烯使溴水或酸性高锰酸钾溶液褪色均属于加成反应
B.
乙醇与浓硫酸混合,加热至170 ℃制乙烯的反应属于取代反应
C.
用酸性重铬酸钾溶液检验酒驾,发生的反应属于乙醇的氧化反应
D.
等质量的乙烯和乙醇完全燃烧,消耗O 2 的物质的量相同
【简答题】( ) 5. We will arrive in Beijing _____ 2:00 ______ the afternoon.A. in; at B. at; on C. at; in D. on ; in
【简答题】Good afternoon, ladies and gentlemen! Welcome __1__ the luxury cruise train to Canberra, __2__ and Brisbane. We are scheduled to arrive in Canberra at __3__ this evening. There will be a 20-minute res...
【简答题】用括号内所给单词的正确形式填空。 1. The famous_________(predict) will come true next year. 2. We will have_________ (little) pollution than before. 3. They want to know if he_________(arrive) in Yantai in 2 days. 4. ...
【简答题】完形填空。 I’m going to take my family on a trip. 1 are going by train to New York, and then take a ship to Europe(欧洲).When we arrive in Europe, we’re going to some countries for 2 because there’re many ol...
【简答题】书面表达,根据所给邀请函内容选择合适的信息为 Mike Smith 写一封接受邀请的回信 : Dear Mike, My brother John will be staying with us for a few days during the Christmas Holidays. My wife and I have planned a family dinner for him at se...
【简答题】II . 用适当的介词填空。 1. The hotel is next ______ the supermarket. 2. Is there a park ______ the neighborhood? 3. There is a restaurant ______ the library and the school. 4. The school is across _______ the ...
【简答题】 Dear Mike, My brother John will be staying with us for a few days during the Christmas Holidays. My wife and I have planned a family dinner for him at seven o’clock next Saturday evening. Many of ou...
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