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问题 不定项选择

某物体以20m/s的初速度竖直上抛，不计空气阻力，g取10m/s2。5s内物体的[ ]

A．路程为25m

B．位移大小为15m，方向向上

C．速度改变量的大小为10m/s

D．平均速度大小为10m/s，方向向上

答案

AB

填空题

按每小题的要求转换下面的句子，每空一词。(每小题1分；满分5分)

小题1:There is something special in today’s newspaper. （改成否定句）

_______ is________ special in today’s newspaper.

小题2:My mother often does housework in the evening.（一般疑问句）

_______ your mother often ______ housework in the evening ?

小题3:I’d like two kilos of beef. (对划线部分提问)

_______ ________ beef would you like ?

小题4:Not only I but also my sister likes online shopping. (改为同义句)

______ I _____ my sister like online shopping.　

小题5:The man with a pair of glasses is my physics teacher .(改为定语从句)

The man _______　_______ a pair of glasses is my physics teacher.
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填空题

写出下列元素的符号或名称．

氢______碳______镁______铜______磷______

O______N______K______Zn______Ag______
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