问题
选择题
— Is there a big house behind the tree?
— ______. [ ]
A. Yes, there is
B. No, there aren't
C. Yes, it is
D. No, they aren't
答案
答案：A
搜题请搜索小程序“爱下问搜题”
— Is there a big house behind the tree?
— ______. [ ]
A. Yes, there is
B. No, there aren't
C. Yes, it is
D. No, they aren't
答案：A
CaCl2+2Cl2↑+2H2O