外汇必须以外国货币来表示是外汇的基本特点。( )
参考答案:对
对血小板减少引起的严重出血有效的治疗是()
A.丙酸睾丸酮
B.浓缩血小板
C.护肝药物
D.12~16小时
E.环孢素A
. We all write _______, even there’s not much to say
A. now and then
B.more or less
C.step by step
D.at least