在买卖双方对对方的信誉等不了解时，在贸易合同中采用支付方式较为合适（）.
A.跟单托收
B.跟单信用证
C.A或B
D.A和B都不可
参考答案：B
The way ______ was thought of by him ______ the experiment was similar to the way _____ you carried it out.
A. that, doing, which B. which, of doing, in which
C. what, to do, \ D. it, of doing, that
沉降药物的作用有（）
A.泻下
B.清热
C.重镇安神
D.收敛
E.止咳平喘
