Oleaceae的主要特征是:
A.花两性
B.花单性
C.雄蕊2枚
D.雄蕊4枚
E.花瓣4裂草本植物
参考答案:A,B,C,E
.Because of the heavy sandstorm, we had to put off the visit until tomorrow to the exhibition of painting _____in the nearby city.
A.to hold
B.held
C.holding
D.being held
因战争、运河关闭等特殊原因,迫使船舶不能沿正常航线航行,需绕道航行,延长运输距离,承运人在收取运费时需要加收()。
A.特殊附加费
B.非直航附加费
C.绕航附加费
D.战争附加费