境内个人购汇参加境外培训超年度总额必需材料().
A.因私护照及有效签证(或签注)
B.境外培训费用证明(可原件、传真)
C.境外培训机构证明
参考答案:A, B
It is said that this is the biggest lab ________ they have ever built in their school.
A.which
B.what
C.不填
D.where
4 4 2 -2________( )
A.0
B.-8
C.-4
D.1