They are developing new types of plants that can be grown in poor soil or even sand,and that are

less       to be attacked by pests and diseases.

A.possible

B.probably

C.likely

D.maybe

( )思想直接孕育了《雅典 * * 》所提出的功能分区的原则。

A．线形城市

B．田园城市

C．下业城市

D．区域规划