下列各句中，没有语病的一句是(    )

给出下列五个命题：

①函数y=f（x），x∈R的图象与直线x=a可能有两个不同的交点；

②函数y=log₂x²与函数y=2log₂x是相等函数；

③对于指数函数y=2^x与幂函数y=x²，总存在x₀，当x＞x₀ 时，有2^x＞x²成立；

④对于函数y=f（x），x∈a，b，若有f（a）•f（b）＜0，则f（x）在（a，b）内有零点．

⑤已知x₁是方程x+lgx=5的根，x₂是方程x+10^x=5的根，则x₁+x₂=5．

其中正确的序号是____ ．

判断对错.

质数的因数只有一个.

根据首字母提示完成短文填空。

       Last spring I was walking in a park. In front of me there was a mum and her 3-year-old daughter. The little girl was holding a string(线), which had a balloon at the other e____.

       All of a sudden, a l____ wind took the balloon from the little girl. I thought she would cry.

       But, no! As the little girl turned to watch her balloon rise to the s____, she cheerfully shouted out, “Wow!”

       That little girl t____ me something.

       Later that day, I received a phone call from my friend, he told me an unexpected problem. I felt like replying  with “Oh no, what should we do?” But remembering that little girl, I found m____ saying, “Wow, that is interesting! How can I help you?”

       One thing is for sure－life is always going to make us f____ unexpected problems,  however, how to deal with them is our choice. We can choose to be annoyed or i____.

      No matter what the situation is, a “Wow!” will always b____“Oh, no.”

     So the next time you meet one of life’s unexpected guests, remember that little girl and make it a “Wow!” experience. The “Wow!” always works.