“极点”的产生是由于肌肉活动不能满足内脏器官活动的需要。
参考答案:错
Because farmland__________quickly,the government are considering starting a program to solve the problem.
A.is being lost
B.is lost
C.is losing
D.loses
下列山脉既是我国地势第二和第三级阶梯的界线,又是季风区与非季风区界线的是[ ]
A、秦岭
B、太行山
C、阴山
D、大兴安岭