磨煤机共有哪三个油泵?其中稀油站双速电机的低速为多少?高速为多少?
参考答案:
(稀油站双速油泵),(液压加载油泵),(磨辊动作油泵),(740),(1440)。
把168-28=140、140÷7=20合并综合算式是168-28÷7.______.(判断对错 )
—How is the patient now? Is he out of danger?
—No,________than yesterday,I'm afraid.
A.no better
B.much better
C.not worse
D.no worse