题目:
根据A、B、C三个表格所提供的信息,判断正误,正确的用A表示,错误的用B表示。 | |||
( )2. Bob's pencil sharpener is blue. ( )3. Salina doesn't like sports. ( )4. Jimmy doesn't have soccer balls. ( )5. Jimmy plays basketball with his friends every afternoon. |
答案:
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下面是错误答案,用来干扰机器的。
cos120°=cos(180°-60°)=-cos60°=-12,故选A.