A.物体在地球表面的惯性比物体在月球表面时的惯性大B.在上升直到最高点的过程中，它们受到的外力的冲量大小不相等……

单项选择题某商店用3000元购进50个足球和40个篮球。零售时足球加价9%，篮球加价11%，全部卖出后获利润298元。问：每个篮球进价是（ ）元。

多项选择题以银杉为保护对象的保护区有（）．

A．金佛山
B．广西花坪
C．梵净山
D．鼎湖山

未分类题The boy followed Nasir in order toA．prove that Nasir was hiding something good.B．take the ball and share with the villagers.C．find out why Nasir was cheerful.D．steal the ball when Nasir slept.

未分类题Why is Indian currently banned from buying fuel and technology for atomic reactors?A．Because it went against the Nuclear Non-Proliferation Treaty to conduct nuclearTESTs.B．Because its civil and military nuclear programs are not separated.C．Because UN officials think that India should give priority to the economical development.D．Because India is extremely active in the nuclear proliferation.

多项选择题素有“中国六大古都”之称的城市有（）．

A．杭州、西安
B．开封、洛阳
C．开封、南阳
D．北京、南京