第15题: [单项选择]Two thirds of the US basketball players are black, and the number would be greater ______ the continuing practice of picking white bench warmers for the 'sake of balance. A. was it not because of B. had it not been for C. were it not for D. would it not have been for 参考答案:C 答案解析:这是个虚拟语气的倒装用法,省略if,将be动词提前,又因为前句是would be greater,可见是一般现在时的虚拟语气,所以后半句要用were作谓语,所以选C。
第29题: [多项选择]风机机开机操作事项包含() A. 关闭出口挡板和进口调节门以减少电动机启动时的载荷 B. 打开出口挡板,等接到中控室打开进口调节门的指令后,根据风量、负压和电流情况,逐渐打开进口调节门 C. 确认原料给料装置是否正常开启 D. 确认头部尾部端部密封装置调整到正常的位置 参考答案:A, B