近些年来新研制的浮选机在保证叶轮线速度设备要求的前提下，大都采用高转速、小直径叶轮，以提高其充气量，降低功率消耗。
参考答案：对
第二卷（共三部分，满分42分）
一、选词填空。（每空1.5分，满分12分）
1. His kids are all______________going fishing with him.
2. I______________the same food every day.
3. His laziness______________his failure.
4. They’d like to see their daughter______________ ,get married and have kids.
5. Our success______________everyone’s hard work.
6. If you can’t give up smoking completely, at least try to______________.
7. They set up a monument______________ those who died in the earthquake.
8. A big fire______________at 2 o’clock last night.
在五型肝炎病毒中，其中有一个缺陷病毒，它需要其他病毒的帮助才能组装成完整的病毒颗粒，这个病毒是
A．甲型
B．乙型
C．丙型
D．丁型
E．戊型
