关于气候对东北地区农业生产影响的叙述，正确的是（  ）

有理数a、b在数轴上的位置如图所示，则化简|a+b|﹣|a﹣b|的结果为（　　）

对下面的一则公益广告进行点评，不超过30字。

双面用，不丢面。(倡导节约用纸广告)

阅读下面文言文，回答问题

    太史公文，疏与密皆诣其极。密者，义法也。苏子由称其“疏荡有奇气”，于义法犹未道及。太史公时有河汉之言，而意理却细入无间。评者谓“乱道却好”，其实本非乱道也。 史记叙事文外无穷虽一溪一壑皆与长江大河相若。叙事不合参入断语。太史公寓主意于客位，允称微妙。太史公文，悲世之意多，愤世之意少，是以立身常在高处。

（清•刘熙载《艺概•文概》）

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Laura Simpson Once saved(挽救)the lives of over 30 people on a bus．Police in Australia said that they wanted to give Laura a(n)1for her bravery．That day,Laura was travelling home from2school on a bus．But suddenly the bus turned off the

road．

    "It was 3：00 am，so I was 3．"Laura said．

    "But then I felt a big bump(颠簸)and woke up．I found the bus was off the road and going towards the trees．I looked at the4and saw him lying over the wheel(方向盘)without moving．I jumped out of my seat(座位)and took the wheel．I shouted for someone to call an ambulance(救护车)．Then I5the bus and helped the others off the bus．"

    After the ambulance left，Laura called the bus company and asked for a new driver．6the driver didn't arrive till the next day．While they were7him，Laura and some people played football and sang songs．

    Laura's story soon appeared in many newspapers and on TV"Someone8called me from Scotland．I9believe how far it has gone!"she said．Laura planned to spend her school holidays helping her parents10their farm and learning to drive．"I hope I can pass my test!"she said．