单项选择题
A.人们喜欢在宽阔的海面上运输货物,因为它价格低可以行大船。 B.海洋运输被广泛使用,因为很容易用大船运送较为低廉的商品。 C.人们广泛使用,海洋运输,因为它具有运量较大,运费较低的特点。 D.海洋运输被广泛使用,因为它运量大,虽然花费不低。
A.It is difficult to tell someone’s personality. B.It is difficult to describe someone’s face. C.It is difficult to recognize fingerprints. D.It is difficult to know what someone else thinks about.
A.type AB B.exactly the same type as yours C.a mixture of salt, plasma, and type O D.either A or O