题目

—Do you think attending training courses is a great help when you look for a new job?—Well, it all depends. Besides, it gives me ________ a chance to try.A. more than B. more ofC. less than D. more or less 答案：【答案】B【解析】考查短语辨析。句意：——你觉得参加培训班对你寻找新工作帮助大吗？——视情况而定吧。但不管怎样，它给了我更多的机会去尝试。A. more than超过；B. more of更多的；C. less than少于；D. more or less或多或少。培训班应当是提供了更多的尝试机会，故选B。空气中体积分数约为21%的气体是 A．氮气 B．氧气 C．二氧化碳 D．稀有气体