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填空。 When July comes, children know they'll have 1 exams and the school year will end soon. Boys and girls will have a nearly two months'holiday,and they'll leave school 2 train or by car to 3 to see their fathers and mothers. The summer holidays are the 4 time of the year for most children. The weather is usually good, so one can 5 most of his time playing outside. If one lives in the country, he can 6 into the woods (森林) and in the fields. If one lives in a big town, he can usually go to a park to play. The best place for a summer holiday is the 7 . Some children are 8 enough to live near the sea. But for the others who do not, if they have chance to stay at one of the big seaside towns for a week or two, they will talk about it all the following school year. Now, 9 makes children like the seaside so much? I think it's the sands (沙滩), the sea and the sun, not anything else. Of course, there are 10 new things to see, nice things to eat, and interesting things to do. But the feeling of sand under their feet, of salt water on their skin, and the feeling of the warm sun on their backs make them happier. (     )1.A.they (     )2.A.on (     )3.A.go to town (     )4.A.best (     )5.A.take (     )6.A.go out (     )7.A.village (     )8.A.1ucky (     )9.A.that (     )10.A.1ittle B.them B.by B.leave home B.better B.use B.go back B.seaside B.sad B.who B.much C.their C.in C.return home C.worst C.pay C.go off C.city C.quiet C.what C.a little D.theirs D.with D.stay at home D.worse D.spend D.go for D.town D.comfortable D.where D.lots of
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【简答题】将 15 名新生随机地平均分配到三个班级中去,这15名新生中有3名是优秀生.问 (1) 每一个班 级各分配到一名优秀生的概率是多少? (2) 3 名优秀生分配在同一个班级的概率是多少?
【单选题】无水【图片】和氨水作用能形成两种配合物,组成相当于【图片】及【图片】。当加入【图片】溶液时,能从第一种配合物水溶液中将几乎所有的氯沉淀为AgCl,而从第二种配合物水溶液中仅能沉淀出相当于组成中含氯量2/3的AgCl;加入NaOH并加热时两种溶液都无氨味。试从配合物的形式推算出第二种配合物的内界和外界:
A.
B.
C.
D.
【单选题】热力学所研究的工质一般是( )物质。
A.
气态
B.
液态
C.
固态
D.
液晶态
【单选题】热力学所研究的工质一般都是( )物质
A.
气态
B.
液态
C.
液晶态
D.
固态
【单选题】将15名新生随机地平均分配到三个班级中去,这15名新生中有3名是优秀生.则每个班级各分配到一名优秀生的概率是( )
A.
10/91
B.
15/91
C.
25/91
D.
35/91
【单选题】热力学所研究的工质一般都是(     )物质
A.
气态
B.
固态
C.
液态
D.
液晶态
【单选题】无水【图片】和氨水作用能形成两种配合物,组成相当于【图片】及【图片】。当加入【图片】溶液时,能从第一种配合物水溶液中将几乎所有的氯沉淀为AgCl,而从第二种配合物水溶液中仅能沉淀出相当于组成中含氯量2/3的AgCl;加入NaOH并加热时两种溶液都无氨味。试从配合物的形式推算出第一种配合物的内界和外界:
A.
B.
C.
D.
【单选题】将15名新生随机地平均分配到三个班级中去,这15名新生中有3名是优秀生.则3名优秀生分配在同一班级的概率是( )
A.
6/91
B.
12/91
C.
18/91
D.
24/91
【简答题】将 15 名新生随机地平均分配到三个班级中去,这15名新生中有3名是优秀生. 3 名优秀生分配在同一个班级的概率是____。 (答案用“ / ”表示)
【简答题】将15名新生随机分配到三个班级中,这15名新生中有三名优秀生,(1)问每个班各分配了一名优秀生的概率。 (2)3名优秀生被分到同一班中的概率。
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