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【简答题】
Mr Black was walking in the forest(森林) He was scared when he heard a terrible noise. But he could not get out of the forest. His friends were waiting for him in a village outside the forest. They would give him a lot of money if he took a tiger to them, or they were going to laugh at him. Mr Black liked hunting(打猎). He usually killed some birds and animals. But a week ago, after he drank too much, he called himself a brave hunter. So his friends bet(打赌) him twenty thousand dollars if he could kill a tiger. Suddenly, he heard a little noise. He ran to a big tree,and climbed up it quickly.He didn’t come down until he saw it was a farmer. He went close to him and asked, “Excuse me, sir.Are there any tigers in the forest?” “Yes,” said the farmer. “I saw a lot of tigers’ tracks(足迹)about a kilometer north near here.” “Good!”Mr Black said in a hurry. “Which way is to the south,then?” 小题1:Mr Black was good at________ A drinking   B hunting small animals  C running   D betting 小题2:Which is NOT true? A Mr Black was a brave hunter. B Mr Black was scared of tigers. C He thought a tiger was close to him, so he climbed up the big tree quickly. D Mr Black asked the farmer the way to run away. 小题3:We can guess ________ finally. A Mr Black got twenty thousand dollars B his friends would think he was very brave C Mr Black won the bet D Mr Black lost the bet
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【简答题】物质的导热系数,一般来说,金属的导热系数(),非金属的导热系数(),液体的导热系数(),气体的导热系数()。(A最小 B最大,C较小 D较大。请在上述空中选择填入字母。)
【单选题】一般情况下,液体的表面张力随温度的升高会 ( ) 。
A.
、增大
B.
、减小
C.
、不变
D.
、先增大再减小
【单选题】在非金属液体中,( )的导热系数最高。
A.
B.
乙醇
C.
甘油
D.
甲醇
【单选题】在非金属液体中,()的导热系数最高
A.
B.
乙醇
C.
甘油
D.
甲醇
【单选题】在测定含水量过程中,当用各种测试方法所得结果不一样时,应以()为准
A.
酒精燃烧法
B.
标准烘干法
C.
碳化钙气压法
D.
比重瓶法
【单选题】肺结核患者传染性最强的时期是在化疗( )
A.
开始后
B.
开始前
C.
正在使用中
D.
有反应时
E.
停药后
【单选题】一般情况下,液体的表面张力随温度的升高会
A.
增大
B.
减小
C.
不变
D.
先增大后减小
【单选题】在非金属液体中, ( ) 的导热系数最高。
A.
水;
B.
、乙醇;
C.
、甘油;
D.
、 甲醇
【单选题】在非金属液体中,导热系数最大的是()。
A.
甲醇
B.
甘油
C.
D.
乙醇
【多选题】在通信电源系统中,联合接地是将( )共用一组地网。
A.
交流接地
B.
直流接地
C.
保护接地
D.
防雷接地
E.
交流零线
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