下列属于消费者与生产者之间的关系的是[ ]
A.青蛙捕食蝗虫
B.兔子啃吃松蘑
C.山羊吃树叶
D.人类吃黑木耳
答案:C
异常的 * * 镜图像包括()
A.白色上皮
B.白斑
C.点状血管
D.镶嵌
E.异型血管
The main reason for the fast growth of population is not()a rise in birth rates as a fall in death rates as a result of improvements in public health service and medical care.
A. such
B. the same
C. so much
D. as much