我国人与地突出的问题是[ ]
A.国土面积大,耕地总面积很小
B.后备耕地资源丰富
C.人口增长迅速,人均耕地越来越少
D.草场过度放牧,草地遭受破坏,数量减少
答案:C
Was it on a lonely island ________ he was saved one month after the boat went down?(2011·四川)
A.where
B.that
C.which
D.what
果实和种子饮片含药屑杂质量是()
A.1%
B.2%
C.3%
D.0.5%