．实验室里用苯与溴反应制取溴苯，反应后将所得液体倒入水中，分层后水底褐色的液体是: （     ）

给句子选择正确的修辞方法

A、拟人         B、比喻        C、排比

①他们有的捉螃蟹，有的捞海鱼，有的捡贝壳。____

②荷叶挨挨挤挤的，像一个个碧绿的大圆盘。____

③杨梅树伸展着四季常绿的枝条，一片片狭长的叶子在雨雾中欢笑着。____

两块水平放置的金属板间的距离为d，用导线与一个n匝线圈相连，线圈电阻为r，线圈中有竖直方向的磁场，电阻R与金属板连接，如图4所示，两板间有一个质量为m、电荷量＋q的油滴恰好处于静止，则线圈中的磁感应强度B的变化情况和磁通量的变化率分别是                                                                     
(　　)

比例尺A是1：1000，B是1：100000，那么它们的大小比较为 (    )

请认真阅读下面短文，并根据各题所给首字母的提示，写出一个合适的英语单词完整、正确的形式，使短文通顺。
       When you wave to a friend, you are using sign language. When you smile at someone, you mean to be  f____ . When you put one finger in front of your  m____  you mean “Be quiet.”
       Yet, people in different countries may use different sign languages. Once an Englishman was in Italy. He could speak little Italian. One day when he was walking in the street, he felt h____  and went into a restaurant. As the waiter came, the Englishman  o____  his mouth, put his fingers into it and took them out again and moved his lips (嘴唇). In this way, he meant to say, “ B____  me something to eat.” But the waiter gave him a lot of things to  d____ . First tea, then coffee, then milk, but no food. The Englishman was sorry that he wasn't a____  to tell the waiter what he wanted. He was just going to l____  the restaurant when another man came in and put his hands on his stomach. And this sign was clear e____  for the waiter. In a few minutes, the waiter brought him a large plate of bread and meat. At last the Englishman had his meal in the   s____  way.