【单选题】A(An) is a document made out by the seller as a supplementary document to the commercial invoice to make up the deficiency of an invoice by giving all the necessaryparticulars of the goods.
【多选题】What major changes have taken place in American life according to Part 2 (Para. 2-4)?
A.
American people are growing conservative.
B.
Patterns of courtship and marriage have changed radically.
C.
Women are changing the rules.
D.
America is worried about its schools.
【判断题】机械波的 波动 频率和波长与其波源的振动频率和波长相同。
【单选题】Major changes have been ____ in some developing countries in recent times.
【多选题】对柳永《望海潮》词中“羌管弄晴,菱歌泛夜”一句,分析正确的是 。