帮助功能（）选项卡，可以浏览帮助窗口列出的帮助主题。A、搜索B、索引C、目录D、书签

人体共有_________余块肌肉，其重量约占成人体重的_________。

根据句意及首字母提示写出所缺单词。

1. People in Korea are supposed to b_____ when they meet for the first time.

2. In China people often s_____ hands with each other when they meet for the

first time.

3. My classmates are m_____ boys.

4. You're supposed to k_____ when you meet people for the first time in Brazil.

5.  When you are i_____ for a party, you should arrive a little earlier in my

country.

砷酸、焦砷酸、偏砷酸

劳埃德认为米利都学派的特点是（）

A、崇尚神学和追求精神生活

B、自然的发现和理性的批判与辩论

C、注重实践与政治伦理

D、以上说法都不对

《水经注》对某一项水利工程有这样的描述，“旱则藉以为溉，雨则不遏其流”。这项水利工程是（）

A.郑国渠

B.都江堰

C.隋大运河

D.漕渠