问题
选择题
You can never imagine what great trouble I have had ________the patient who received a serious wound.[ ]
A. to treat
B. treated
C. treat
D. treating
答案
答案：D
搜题请搜索小程序“爱下问搜题”
You can never imagine what great trouble I have had ________the patient who received a serious wound.[ ]
A. to treat
B. treated
C. treat
D. treating
答案：D
Si+2CO↑。欲制取7t的硅，需要参加反应的二氧化硅质量为多少吨？