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- 1我们生活在三维空间还是四维空间
- 2After climbing for seven hours,he finally (managed) reach the top of the mountain.
- 3The old man is living a ____,but he doesn't feel l_____.
- 4质量相等半径相同的空心铜球、铁球和铝球各一个(ρ铜>ρ铁>ρ铝),则空心部分体积最大的球是( ) A.铜球 B.铁球 C.铝球 D.条件不足,无法确定
- 5多项式3x立方-2x平方-5x-m与多项式8x平方-3x+5的和不含常数项,则m=
- 6一个两位数,它能被3整除,又是5的倍数,而且个位上是0,这个数最小是_.
- 7妈妈想买2.5千克苹果,发现钱不够,还差1.5元,于是妈妈买了2千克苹果,还差1.3元,每千克多少元?
- 8有一个高为8厘米,容积为50毫升的圆柱形容器A,里面装满了水,现在把长6厘米的圆柱B垂直放入.
- 9Which country'scapital is Seoul?It's( )A.Japan B.South Korea C.Mexico
- 10Why do people say that cats have nine lives?Some people believe in the superstition that cats have