re
- 输水管道在流量和水温一定时,随着直径的增大,水流的雷诺数Re()。
- 圆管紊流光滑区的沿程损失系数λ()。
- 圆管紊流粗糙区的沿程损失系数λ()。
- 地源热泵机组的地埋管换热器管内应保持的紊流状态,符合要求的管内流体的雷诺数应是下列哪几项?
- 抗震设计时,结构构件的截面抗震验算应采用下列哪一个公式?()(s一构件内力组合的设计值;R一构件承载力设计值;γ0一构件重要性系数;γRE一承载力抗震调整系数)
- We’re organizing a party next Saturday, and I’d like you to come. —- _______! I have another one that day. Thank you just the same.
- Hi, Kathy. We’re going to have a party this Saturday. Will you come? — __________. What time?
- We’re programmed to want more food, we won’t have a chance to eat tomorrow.
- You’re_____your time trying to persuade him. He’ll never join us.
- They’re going to go to a football match _____ Saturday afternoon. [ ]