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- 1在湖边,可以看到岸边的树在水中的倒影,这是光的什么现象?
- 2在一个小数减法算式中,差是5.25,如果被减数增加0.5,减数减少0.4,那么现在的差是( ) A.6.15 B.5.75 C.6.75
- 3Speak中ea的音标
- 4给下面的句子加上正确的标点.
- 5the workers were so angry with their boss that they threw down their tools and left their tasks--- the million.Awith B b
- 6如图,有8张卡片,上面分别写着自然数1至8.从中取出3张,要使这3张卡片上的数字之和为9.问有多少种不同的取法(不考虑顺序)?
- 7is ( )eraser.You should look after it .
- 8She walks to work(同义句)怎样改?
- 9This is my hometown.I like it very much.When I was a I( ) boy I liked to s( ) in the river.The
- 10一个多项式A加上5x的平方+3x-2的两倍,得1+x-3x的平方 ,求这个多项式A .