—Hey, Tom. ______ the waste paper and throw it into the bin. You can't throw it here.
—Sorry.
A:Take up
B:Pick up
C:Make up
属于化学性质的是( )
电视机厂原计划4月份生产高清晰度电视机2100台.开展劳动竞赛以后,只用20天就完成了任务.实际生产效率比原计划提高了百分之几?正确的解答是( )