船体纵骨架结构是:()
①、纵向构件排列密而小;
②、横向构件排列疏而小;
③、纵向构件排列密而大;
④、横向构件排列疏而大
A.①、②
B.②、③
C.①、③
D.①、④
参考答案:B
口腔疾病患者应该避免()
A.油烹煎炸食物
B.牛奶以及过甜食物
C.过咸过酸食物
D.过硬食物
E.过软食物
Young people who have got jobs may realize university lessons can’t be the only preparation for all of the situations ________ appear in the working world.
A.where
B.when
C.that
D.What