根据650-180=470，470×5=2350，2350÷25=94组成一个综

人的一生中决定体格、体质、心理和智力发育发展的关键时期是（）。

A.婴儿期

B.幼儿期

C.学龄前期

D.学龄期

E.青春期

下列关于花和果实的叙述不正确的是（　　）

A．将未成熟的花进行套袋处埋，透气的袋内能结出果实说明花是雌花

B．通过对玉米实施人工辅助授粉，可以解决玉米果穗顶部缺粒现象

C．玉米的种皮和果皮紧密结合在一起，一粒玉米就是一个果实

D．一个西瓜含有多粒种子，说明一个子房中有多个胚珠

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. Heterogeneous network environments consist of computer systems from (66) vendors that run (67) operating systems and communication protocols. An organization that (68) its computer resources is usually (69) the task of integrating its heterogeneous systems. Typically, each deparlment or division has defined its own network needs (70) OS, LAN topology, communication protocols,applications, and other components.

A．same

B．similar

C．different

D．difference

“不义富且贵，于我如浮云”是谁说的（）

A.老子

B.墨子

C.孔子

D.韩非子

GIS等开关设备的新六氟化硫气体应有（）检验报告及合格证明文件。