下列哪一个是目前作为灌溉的生理指标最受重视()
A、叶片的含水量
B、叶片气孔开度
C、叶片水势
参考答案:C
There was less food for birds and also for the Prairie dog, an______holes in the ground.
A.livs
B.is living
C.living
D.lived
海水淡化的化学方法虽然不受气候影响,但是成本高,主要配备在飞机上。()