This is Miss Gao. She _________your new_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

This is Miss Gao. She _________your new teacher.[ ]

A. be

B. am

C. is

D. are

答案

C

解答题

xy)•(-15xy)．

判断题

溶出液ak高，能提高分解率和拜耳法循环效率。