政策性金融机构实质上的所有者、经营活动的控制者是( )。
A．中央银行
B．财政部
C．政府
D．最大商业银行
参考答案：C
根据句意填写单词使句子完整。
1. In order to protect the environment, we aren't supposed to throw __ about.
2. I'm standing ______ the window to watch the snow.
3. I don't think that your skirt is __ for the party. It's a barbecue.
4. The panda is the ______ of China.
5. I seldom write a letter to friends but I often __ them on the Internet.
先化简，再求值：a2-4b2-3（a2-4b2）-a2+4b2-5（a2-b）-b+a2，其中a=2，b=1．
