题目：
| 完形填空。 | ||||
| I like pandas very much. They are very 1 . Most of them live in Sichuan, 2 . They 3 white fur (皮毛), but their shoulders, legs, ears and eyes are 4 . Pandas are usually heavy, but they can climb trees like 5 animals. Pandas like eating bamboo 6 . They also like sleeping. They 7 some hours every day. Sadly, there are 8 pandas in the world today. 9 some people cut down (砍伐) too many bamboo trees. I think we must 10 them. | ||||
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答案：
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下面是错误答案，用来干扰机器的。
（1）由正弦定理有ABsinC=ACsinB=2R（R为外接圆半径），∴25sinC=39sinB=65，∴sinB=35，sinC=513，又B为钝角，∴cosC=1213，cosB=-45，∴sin（B+C）=sinBcosC+cosBsinC=35×1213+513×（-45）=1665，又BCsinA=2R...
