某市政工程网络计划如下图,其关键线路是()。
A.①→②→③→⑤→⑦→⑧
B.①→②→③→⑤→⑥→⑦→⑧
C.①→②→③→④→⑥→⑦→⑧
D.①→②→④→⑥→⑦→⑧
参考答案:B
重新排列下列句子,使之成为完整的对话。
1. You're early, too!
2. What are you doing now?
3. Do you like running?
4. Morning! You are early today.
5. Running.
6. How often do you exercise?
7. Yes, very much.
8. Let's go running together.
9. Twice a week.
10. OK. Let's go.
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三相分离器的关键部分是油水界面的控制。