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- 1某同学在760mm高水银柱大气压下做托里拆利实验,他从槽中水银面沿着管子量得水银柱长为770mm,其原因是( ) A.实验时管内进入空气 B.管子插入水银槽内太浅 C.测量得直尺没有竖直放置
- 2已知3x+4y-5=0,则8的x次方乘16的y次方=————
- 32007减去它的2/1,在减去余下的3/1,再减去余下的4/1,依此类推,一直到减去余下的2007/1求最后剩下的数
- 4“为了中国,我们为人、做事、 求学问,一定要有这种拼命的精神.”请你举一实例解释这句话的意思.
- 5Do you believe the reason why Tom gave for his being late for work?
- 69 8 7 6 5 4 3 2 1=1000 中间加任意符号
- 7I want to go there by ship.(用by train构成选择疑问句)
- 8求y与x的函数关系式并直接写出自变量x的取值范围?
- 9Excuse me,could you tell me_____?----Sorry,I'm new here,too.
- 10the government plans to bring in now laws___parents to take more responsibility for the education o