与传统的杂交育种相比，植物体细胞杂交优越性体现在 （   ）

与地球上存在生命无关的因素是(　　)

任务型阅读 
    My friend, Tom lives a happy life.（1）He usually gets up at 6:00 . Then he goes for a walk. At 7:00 he comes back. He brushes his teeth and takes a shower. （2） Then he eats breakfast. After breakfast, he goes shopping（购物）with his friends. （3）他大约十点半到家。And he cooks lunch. After lunch, he goes to the club. He reads books and plays chess. He eats dinner at home at 6:00 pm. （4）           the evening he likes watching TV. At around 9:00 pm he goes to bed.
根据短文内容，完成下列任务

——Mum, the train is leaving in eight minutes. I      go now.——Okay, Jim, call me when you get there.

③④两省的简称分别为（    ）