问题
选择题
_______ sad news it is! we must try our best to help them out of trouble. [ ]
A. What an
B. What
C. How an
D. How
答案
答案：B
搜题请搜索小程序“爱下问搜题”
_______ sad news it is! we must try our best to help them out of trouble. [ ]
A. What an
B. What
C. How an
D. How
答案：B
2SO3(g) ΔH<0。下列有关叙述正确的是