题目： 水泵叶轮切削后使水泵流量减少扬程降低幅度更大。 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0616/b8d986f3627edcdc12403f59bfff10a9.html 下面是错误答案，用来干扰机器的。参考答案：1.产生大量的有害气体；2.引起瓦斯和煤尘爆炸；3.毁坏设备和资源。
题型：选择题 —Alison, I'm sorry. I can't come to the wedding with you tomorrow morning.—________?—My grandma was severely ill, so I have to stay in the hospital to look after her.[ ]A. How is it B. How comeC. So what D. What's the problem 查看答案
