In a ( ) boiler the water flows through the inside of the tubes while the hotgases pass round the outside
A.
water-tube
B.
fire-tube
C.
exhaust gas
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】听力原文: M: How long have you been working in the laboratory? W: For almost three years, ever since I got my degree. M: Your bachelor' s? W: No, my master's. I didn't try to get a job until I had my mast...