问题
选择题
-___you hear me clearly from far away?
-Sorry.I can't.Say it again,will you?[ ]
A.May
B.need
C.Can
D.Should
答案
答案：C
搜题请搜索小程序“爱下问搜题”
-___you hear me clearly from far away?
-Sorry.I can't.Say it again,will you?[ ]
A.May
B.need
C.Can
D.Should
答案：C
mol/L的溶液中：Ca2+、K+、Cl-、HCO3-