7: 天然气的膨胀过程是(????? )。(单选) A: 绝热过程 B: 等焓过程 C: 等熵过程 D: 不可逆过程 ...
4: is the site of the Palace of Versailles, one of the most storied buildings in the history of France. It was originally built as a hunting chateau by King Louis VIII in 1624. In 1669, King Louis XIV began searching for a grand site where ...
1: You really have to get very old before you realize you’re old. I’m in my middle fifties and I don’t feel old yet. However, sometimes I look back at my childhood and ## things to the way life is for today’s kids. Some things have ## c...
4. Charlie thinks money will ______ all his problems. A. score B. solve C. force D. perform ...
9.??按照抽油泵在油管中的固定方式,抽油泵可分为管式泵和杆式泵,管式泵适用于井深、产量高的油井。 A. 错误 B. 正确 ...
5.??对任何抽油机井而言,下泵深度必须在动液面以下,不可能出现下泵深度小于动液面深度的现象。 A. 错误 B. 正确 ...
1.??抽油机井由于冲程损失、气体、漏失等的影响,抽油泵的泵效一定小于1。 A. 错误 B. 正确 ...
7.??目前应用较为广泛的防腐蚀方法是( )。 A. 刷防锈漆 B. 实体防腐 C. 阴极保护 D. 阳极保护 ...
3.??抽油杆直径可分为( )等几种。 A. 3/8in,3/4in,6/8in B. 16mm,19mm,22mm,25mm C. 5/8in,3/4in,4/8in,5in D. 15mm,20mm,22mm,25mm ...
9.??Vogel方程可用来预测任意油藏的油井产量随井底流压的变化关系。 A. 错误 B. 正确 ...