地球自转一周的时间是(      )

设集合$A=\left\{\left(x,y\right)|\frac{x^2}{4}+\frac{y^2}{16}=1\right\},B=\left\{\left(x,y\right)|y=3^x\right\}$，则$A\cap B$的子集的个数是（  ）

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    I like English very much. I think English is very important and 1. Here are my opinions of 2English well.

    I think there are many ways 3learn English. For example, asking the teacher 4 help is very helpful. One of my good 5said he had trouble 6English. His 7 English is very poor. So he reads aloud every morning. Now he can speak English very well. Watching English shows on TV can also be helpful. You can learn many words 8them. Remember "Where there is a 9, there is a way." Believe you can do it 10 .