题目
水管锅炉相对于烟管锅炉的特点有()circled 1水管锅炉效率较高;circled2蓄水量大; circled 3结构刚性小; A. circled4点火升汽时间短B. circled 1 circled 2 circled 3C. circled 1 circled 3 circled 4D. circled 1 circled 2 circled 4
水管锅炉相对于烟管锅炉的特点有()\textcircled 1水管锅炉效率较高;\textcircled2蓄水量大; \textcircled 3结构刚性小;
- A. \textcircled4点火升汽时间短
- B. \textcircled 1 \textcircled 2 \textcircled 3
- C. \textcircled 1 \textcircled 3 \textcircled 4
- D. \textcircled 1 \textcircled 2 \textcircled 4
题目解答
答案
C