阅读文言文《虹》，完成后面小题。
       世传虹能入溪涧^①饮水,信然^②。熙宁^③中,余使契丹^④，至其极北黑水境永安山下卓帐^⑤。是时新雨霁^⑥，见虹下帐前涧中。余与同职扣^⑦涧观之，虹两头皆垂涧中。使人过涧，隔虹对立，相去数丈，中间如隔绡穀^⑧。自西望东则见，盖夕虹也。立涧之东西望，则为日所烁^⑨，都无所睹。久之，稍稍正东，逾^⑩山而去。次日，行一程，又复见之。孙彦先^⑪云：“虹乃雨中日影也，日照雨即有之。”                       
                                                                                                                                       （选自《梦溪笔谈》）
     【注】①溪涧：溪流、山涧。②信信：确实如此。③熙宁：宋神宗赵项年号，公元1068—1077年。④契丹：宋时北部少数民族政权。⑤至其极北黑水境永安山下卓帐：到了极北方黑水境内的永安山下建起帐篷。卓帐：竖起帐篷。⑥新雨霁：刚好雨后初晴。⑦扣：靠近。⑧绡穀：生丝织成的薄纱。⑨烁：闪烁。⑩逾：越过。⑪孙彦先：与沈括同时代的科学家。

下列关于清真寺的说法，正确的是(      )

①清真寺是伊斯兰教建筑的典型代表

②随着伊斯兰教的传播，清真寺的建筑风格被带到世界各地

③清真寺的建筑风格一般以圆顶寺庙为主体

④清真寺的建筑在世界各地完全相同

      Yesterday when my son and I were eating dinner, I saw a policewoman walking past our house. A woman with a1look was following her.
      I opened the 2 , went out and asked if everything was OK. The policewoman said that the woman's3 had gone missing(失踪) an hour earlier. I said that we hadn't seen the girl, but wecould4.Iexplained to my son that we couldn't finish our5 right then. He said,” Be a kind person, Dad. "We got in our car and6 the girl all over the town. Along the way,a group of chil­dren were playing.  7they heard what had happened, they said they would help8 . They rode their bikes and joined us. 9 the little girl was found safe a few miles away. I was so 10to see many people help a stranger. It is a nice world.

头盔、赛车服、头颈支持系统是赛车手极其重要的防护装备（如图），分别保护赛车手身体的不同部位。