问题
选择题
—We can use QQ to talk with each other on the Internet.
—Really? Hut can you tell me ______ use it? [ ]
A. how I can
B. how can I
C. what I can
答案
答案：A
搜题请搜索小程序“爱下问搜题”
—We can use QQ to talk with each other on the Internet.
—Really? Hut can you tell me ______ use it? [ ]
A. how I can
B. how can I
C. what I can
答案：A
x1，x2∈[a,b]，恒有 