张某有5万美元,他决定将其中的2万美元换成人民币,3万美元换成欧元,根据表四家银行提供的当天外汇报价,张某应选择的银行分别是
A.甲和丁
B.丙和乙
C.丙和丁
D.甲和乙
答案:C
I my homework yesterday, but unfortunately I forgot about it totally.
A.need have handed in
B.should have handed in
C.must have handed in
D.may have handed in
货车制动机按作用方式分为:()