下载APP
【单选题】
高标准农田建设的目标是地面坡度小25度并尽可能建成梯田,田间基础设施占地率应不高于8%,耕作层( )以上,土壤有机质大于15克/千克。
A.
5厘米
B.
10厘米
C.
15厘米
D.
20厘米
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Obtaining Drinking Water from Air Humidity Not a plant to be seen，the desert ground is too dry．But the air contains water，and research scientists have found a (51) of obtaining drinking water from a...
A.
who
B.
where
C.
when
D.
which
【单选题】Section BDirections: There are 2 passages in this section．Each passage is followed by some questions or unfinished statements．For each of them there are four choices marked A, B, C and D．You should de...
A.
they can afford the cure for malaria
B.
they can save their cash efficiently
C.
they can live safely in the village
D.
their can get rid of poverty soon