题目

cos(+)= —，＜＜,sin(-) 的值为（ ）A. — B. C. D. 答案：【答案】D【解析】先化简已知得，再计算得到，最后化简sin(-)求值得解.由题得. 因为＜＜所以.故答案为：D根据首字母或汉语提示写出下列单词小题1:These children love to play t__________ on their English teacher.小题2:She is ___________ （擦）the table.小题3:It may take a few weeks for you to build up your __________ （体力）again.小题4:Don’t be particular about food. A b_____ diet is very important for health.小题5:Not spitting was __________ （允许）in public.小题6:She __________ （尖叫）when she saw a snake approaching her.小题7:For Chinese people, Deng Xiaoping T__________ is very important.小题8:It __________ （迷惑）me a lot how they could do it without modern technology. 小题9:The centre of our city is moving _____________. （向东）小题10:The __________ （市区的）stores are usually busy during Christmas times.