单项选择题
下列有关砂土类土壤的叙述中,正确的是( ) A.土壤中以粗砂和细砂为主 B.土壤黏性大 C.土壤孔隙多 D.土壤通气透水性好
问答题 I think we must take advantage of every chance to practice our English.
单项选择题 “广暂腾而上胡儿马”句中的“暂”字的意义是( ) A.暂时 B.突然 C.新颖 D.姑且
填空题 They had the()(fortune)to be hit by a violent storm.