在坎贝尔和斯坦利的实验设计模式中,实验变量用X来表示。
参考答案:对
Read and judge. 阅读对话 ,判断正(T)误(F) 。
Mike: Mom, I can speak to English people in English.
Mum: English? You learn only a little English. Can you understand them?
Mike: It doesn't matter! But they can't understand me!
( ) 1. Mike can't understand them.
( ) 2. Mike's English is very good.
( ) 3. Mike speaks to Chinese people in English.
( ) 4. The people can't understand him.
根据我国《政府采购法》的规定,下列关于政府采购的表述中正确的是( )。
A.政府采购的对象为货物和工程 B.政府采购的买方是指各级国家机关C.政府采购实行集中采购的方式 D.政府采购所使用的资金是财政性资金