汽轮机停止当转子静止后，应立即投入（）运行。
A.顶轴油泵
B.连续盘车
C.润滑油泵
D.抗燃油泵
参考答案：B
用所给单词的适当形式完成句子.
1. Here are some things they have learned from (scientist) studies.
2. Sunglasses are used for (keep) out the sun.
3. The students are (confuse) about the difficult problems.
4. I'm considering (study) in Beijing or Shanghai.
5. I felt (embarrass) when everyone looked at me.
信息系统经济效益评价的方法不包括 （55） 。
A．投入产出分析法
B．成本效益分析法
C．系统工程方法
D．价值工程方法
