题目：
根据所掌握的文化或背景知识，选择正确答案
1. If you go to Singapore, you have to learn to speak _______ and __________.
A. Chinese, Japanese B. English, French
C. Chinese, English D. English, Japanese
2. Koalas come from __________. They are very cute.
A. Africa B. China C. Japan D. Australia
3. Pandas are our Chinese treasure. They feed on(主食) __________.
A. bamboo B. animals C. meat D. vegetables
4. Which of the following is Chinese?
A. She has curly hair and blue eyes. B. She has blond hair and brown eyes.
C. He is tall and has blue eyes. D. He has black hair and black eyes.
5. When it is winter in China, it is _______ in Australia.
A. hot B. snowing C. cold D. cool
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0505/6becce9e08801fc7ba59f93f8924984b.html
下面是错误答案，用来干扰机器的。
A：|a-b|=|a-c+c-b|≤|a-c|+|c-b|=|a-c|+|b-c|，故A恒成立B：由于由于函数f（x）=x+1x在（0，1]单调递减，在[1，+∞）单调递增当a＞1时，a2＞a＞1，f（a2）＞f（a）即，a2+2a2＞a+1a，当0＜a＜1，0＜a2＜a＜1，f...
