下列结构中,不属于藓类孢子体世代的是()。
A.蒴盖
B.蒴齿
C.蒴柄
D.蒴帽
参考答案:D
Tom, Jack and Rose were named as assistant professors. Believe it or not, ______ three of them were of ______ age.
A.不填; an
B.不填; the
C. the; an
D. the; the
FCA、CPT和CIP三种术语是分别从()三种传统术语发展起来的。
A.FOB、CFR、CIF
B.FAS、CFR、CIF
C.FOB、CFR、DAF
D.EXW、FOB、CIF