经济学家对休闲消费所持的基本态度是()
A.反对
B.适度
C.提倡
参考答案:A
Teachers should give students the way to learn ________ giving them the answers.
A.instead of
B.instead
C.without
D.by
Rh血型抗原中抗原性最强的是哪一种
A.C抗原
B.c抗原
C.D抗原
D.E抗原