问题
选择题
–Do you have some trouble ____ the problem? Do you need some help?
--No, thank you. I can make it myself.
A．solve
B．solving
C．to solve
D．solved
答案
答案：B
have some trouble in doing sth，表示在做某些事方面有困难，故选答案为B
搜题请搜索小程序“爱下问搜题”
SO3(g)△H = -98.32kJ／mol，在容器中充入2molSO2 和1molO2充分反应，最终放出的热量为 [ ]