【多选题】课程中,老师建议同学们阅读以下书籍( )
【单选题】What has contributed most to the redwoods survival?
A.
Absence of natural enemies.
B.
Resistant bark and damp climate.
C.
Isolation from the land.
D.
Cool and foggy climate.
【单选题】______has contributed most to the redwoods survival.
A.
Absence of natural enemies
B.
Resistant bark and damp climate
D.
Cool weather and daily fog
【单选题】12-6.假定经济处于低于充分就业均衡水平,总需求增加就会引起( )。