一 They refused to go on a picnic on such a windy day.
一 It doesn't matter. You can do it next time.
You ______ go and see a doctor at once because you're got a fever.
类型
木地板A
木地板B
木地板C
环保型
150
200
Z
普通型
250
400
600
按分层抽样的方法在这个月生产的木地板中抽取50片,其中A类木地板10片.