题目

“Go and speak to the tribal chieftains,” said the camel driver. “Tell them about the armies that are ________.”A.responding B.settlingC.wandering D.approaching 答案：【答案】D【解析】考查动词词义辨析。句意: “去和部落首领谈谈。”骆驼车夫说。“告诉他们军队来了。” A. responding反应；B. settling安居；C. wandering漫游；D. approaching接近。根据句意可知选D。在△ABC中，a=7，b=8，cosC=1314，则最大角的余弦值是（　　） A、17B、-17C、23D、-23