对非特异性免役的描述，不正确的是
A．生物物种进化中逐渐建立
B．有免疫记忆效应
C．稳定
D．遗传
E．受基因调控
参考答案：B
The world’s population is growing ______, and there is ____ land and water for growing rice.
A．larger; less
B．larger; fewer
C．more; less
D．more; fewer
圆明园
