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

下列河流中属于内流河的是（  ）

人类历史的发展，离不开一代又一代科学家的努力。下列不属于17—20世纪科学家的是(    )

使用刻度尺研究声音响度与振幅关系时，控制尺子伸出桌子外的长度相同，以下实验采用与上述研究方法相同的是(  )

如图所示，物块A放在倾斜的木板上，改变木板与水平面之间的夹角θ，发现当θ=30^o和θ=45^o时物块A所受的摩擦力大小恰好相等，则物块A与木板之间的动摩擦因数大小为（   ）