糖类、油脂、蛋白质都是人体必需的营养物质．

我国热带雨林保存最完整的地方位于（　　）

把下列各数填在相应的集合内．

﹣3，2，﹣1，﹣ $\frac{1}{4}$ ，﹣0.58，0，﹣3.1415926，0.618， $\frac{13}{9}$

整数集合：{____}

负数集合：{____}

分数集合：{____}

非负数集合：{____}

正有理数集合：{____}．

下列关于物体重心的说法正确的是（　　）

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Henry comes from America．He likes1 a lot．He's visited many2．Last summer,he went to India，a county3a long history.During the trip there，he met something4from his culture(文化)．

    One day,he wanted to visit a palace．He went out of the hotel and5a taxi.When he told the driver and palace's name，the Indian6his head．Henry said

    again and the driver shook his head again．Henry,of course，got7．"Why did you always refuse (拒绝)me?"he shouted．"Please drive me to the palace'"The driver answered"Yes．sir!"and shook his8again．The taxi started and Henry didn't say a word．He9it，and then he said to himself,"I see, 'shaking the head' means'10 'here."