空气中水分的含量约为()g/m3。
A.1~40
B.2~40
C.3~40
D.4~40
参考答案:D
—Why did _____ take Aunt Molly almost an hour to get home ?
—I don’t know . Maybe there was something wrong with her car .
A.that
B.it
C.she
D.this
就卖方承担的风险而言,CIF和CFR两种贸易术语相比,( )。
A.前者大
B.后者大
C.两者相同
D.不能确定