第12题: [单项选择](Less women) than men (are attracted) to careers in the physical sciences, even though (there are now) more women in the sciences (than ever before). A. Less women B. are attracted C. there are now D. than ever before 参考答案:A 答案解析:该句意为“尽管现在从事科学研究工作的女性人数比以前大大增多,但爱好物理学的女性人数比男性少”。women是可数名词复数,因此它前面的修饰词只能是修饰可数名词的形容词比较级,故A应改为比较级fewer,
第13题: [单项选择]浮选机电机发热时,应当() A. 看电机风扇罩是否被灰尘堵塞 B. 检查上轴承盖是否调整好 C. 检查主轴转速,张紧皮带 D. 检查药剂添加是否准确 参考答案:A