下列是人体中几种体液的正常pH，酸性最强的是（  ）

（1+i)²⁰-(1-i)²⁰的值是(  )

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    When you look up into the sky on a 1  night, you will see the moon and the  2.

    Since ancient times, men 3  wanted to know more about the moon, the stars and other  4 in the sky. They invented telescopes to get a closer look at them and 5 that there are many suns. moons and planets in the sky. They became interested in the    6 .

  7  October 4th, 1957, the Space Age began when the first man-made satellite was sent into space  8the earth. Today, scientists are able to 9 on the moon. Man will  10  more places one day.

补充句子。

①____，阴阳割昏晓。（杜甫《望岳》）

②人生自古谁无死，____。（文天祥《过零丁洋》）

③崔颢《黄鹤楼》中描绘了登楼所见之景的诗句是____，____。

④李白《行路难》中，体现了诗人相信自己必然会有施展才能的时候的自信和乐观的诗句是____，____。

⑤思念是王湾笔下“乡书何处达？归雁洛阳边”的浓浓乡情，是温庭筠笔下“过尽千帆皆不是，斜晖脉脉水悠悠”的绵绵牵挂，是苏轼笔下“____，____”的殷殷祝福。（用《水调歌头•明月几时有》中的诗句回答）