根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    I'm Maria's mother. She is going to Britain next month. As you know, she'll be 1 with a family for two weeks. Now the most important thing is 2. She should take about £30 in cash and about £200 in traveler's checks (支票）.Then I have to tell her something 3.

    When you 4 at the airport, our host family will meet you there. You must remember to wear a red shirt so that the family will find you 5. I've told them to look out for the 6 shirt. You'll also need to 7 with you 4 photos of yourself and, of course, it's very important that you take the school 8. While you are there, if you have any problem, you can 9 our agent. I'll give you her office phone number now: It's 580-4436 and the person to ask for is Mrs. Belcher, that's B-E-L-C-H-E-R. She's in the 10 from 9 a.m. to 5 p.m. every day. OK! That's everything. Have a good trip.

化合物F具有独特的生理药理作用，实验室由芳香化合物A制备下的一种合成路线如下:

已知：①

②

回答下列问题:

词语运用。用方框中所给的单词的适当形式填空，使短文正确，通顺。每词限用一次。

relax,    watch,    between，    Can，    Oneself,     spend,    learn,    friend,    dad,    channel

    My hobby is watching TV.  It becomes an important part of my life. I____ two hours a day watching TV. When lying on the sofa and clicking the remote control(遥控器). I feel quite ____ .Sometimes , I even wish I ____ be a couch potato(电视迷)  all my life.

    I began to watch TV in my childhood, and soon I lost ____ in it . Because I could keep balance ____ my hobby and my schoolwork, my parents didn't insist that I turn off the TV. My favorite ____ is Discovery and my favorite show is about history . I have ____ many things from it, and it even becomes and affair (事情). That I  can share with my ____. When I feel upset, watching a variety of shows ca make my ____ disappear. 

    I will keep ____ .TV and learning things from it. TV is not only a tool to make my life colorful, but also a friend to accompany(陪伴) me by my side.

写近义词

均匀——____

空隙——____

漾——____

牢固——____

“武汉号’’导弹驱逐舰在亚洲处于领先水平，参加了我国海军首批赴亚丁湾、索马里海域的护航任务．“武汉号”的排水量为7000t，是一种防空、反潜、反舰能力均衡的远洋驱逐舰．（海水的密度为l．03×10³kg／m³，g取10N／kg）
（1）满载时，“武汉号”受到的浮力有多大?
（2）若舰底某处距海面的深度为8m，则该处受到海水的压强是多少?
（3）“武汉号”在巡航时，通过舰载雷达发现了目标．若雷达发出电磁波经2×10s收到了回波，则目标距军舰的距离是多少?