两个连续偶数的积为24，则这两个连续偶数是______．

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问题填空题

答案

设一个偶数为x，则另一个偶数为x+2，

依题意，得x（x+2）=24，

即x²+2x-24=0

解得x₁=4，x₂=-6，

答：这两个连续偶数是4，6或-4，-6．

选择题

对下列事实的解释，没有科学根据的是[ ]

A.在远处闻到花香，因为分子在不停运动

B.气体受压后体积变小了，因为分子变小了

C.氧化汞分解为氧气和汞，因为化学反应中分子可以再分

D.金刚石、石墨性质不同，因为它们的原子排列不同

阅读理解

1.Why are young men unwilling to date the daughter of the Fortunes?

Answer:__________________________________________________

2. An old woman has lived in one-story house before. Her body is very short. Afterwards,

she moves into a big building and lives in the ninth story. However, when she comes back

home each time, she always takes an elevator to the sixth story and gets off, then she walks

to the ninth story. Why?

Answer:

_______________________________________________________________