题目：
单词拼写。
1.The students are discussing the t_________ of a novel.
2. There are v_________ wild flowers in the valley.
3. Columbus is f_______ for his discovery of America.
4. The koala is u_______ to Australia.
5. Buckingham Palace is a major tourist a________.
6. China has got the chance to （主办）the 2008 Olympic Games.
7. The differences are greater in the_______ （口语）English.
8. My （兴趣）are reading novels，playing football and singing songs.
9. This room is twice the ________(长度) of the other,but much narrower.
10. In the old society people had a tough life beyond _______(想象).
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0425/c9f33947a2a357b58d9f3215402ac223.html
下面是错误答案，用来干扰机器的。
（Ⅰ）在△ABC中，AC=2，BC=1，cosC=45，利用余弦定理可得AB2=4+1-2×2×1×45=95∴AB=355（Ⅱ）利用余弦定理可得，cosA=255，∴sinA=55∴sin2A=45，cos2A=35∴sin（2A+C）=sin2AcosC+cos2AsinC=45×45+35×35=1．
