主页
学科
搜索
账户
常见问题
当前学科：石油工程
题目：
未知类型
地层孔隙度越大，其声波传播速度越快。()
A.正确
B.错误
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
最容易发生嵌顿的腹外疝是（）
Dear Sirs, RE: COUNTER-OFFER FOR MOUNTAIN BICYCLES Thank you for your letter about the offer for the captioned mountain bicycles．Although we appreciate the quality of your bicycles, their price is too high to be acceptable．Refering to the sales contract No．8998, you will find that we ordered 1000 bicycles with the same brand as per the terms and conditions stipulated in that sales contract, but the price was 15% lower than your present price．Since we placed the last order, price for raw materials has been decreased considerably．Retailing price for your bicycles here has also been reduced by 5%．Accepting your present price will mean great loss to us, let alone profit．We would like to place repeat orders with you if you could reduce your price at least by 15%．Otherwise, we have to shift to the other suppliers for our similar request. We hope you take our suggestion into serious consideration and give us your reply as soon as possible. Yours truly,
扣件式钢管脚手架主节点处不必设置横向水平杆。（）
自动烟熏炉的用途有哪些？
在下列预加氢反应中，反应速度最慢的是（）。
导淋泄漏的处理？
耐火材料的耐火度是指耐火材料在一定负荷作用下抵抗温度的能力。
吉萨拉
若放大电路引入负反馈，则负载电阻变化时，输出电压基本不变。()
广义的现金收支预算反映的是( )。 A．现金收入 B．现金余缺 C．现金支出 D．现金筹措使用情况