作为公开招标方式第一轮竞争择优活动是( )。
A．编制施工招标文件
B．发出资格预审表
C．资格预审
D．组织评标
参考答案：C
如图是植物根尖结构示意图，请据图回答
（1）图中标号③所示的部位______，该部位含有具有______能力的细胞
（2）图中细胞伸长最快的部位是标号______所示部分
（3）图中标号①所示部位______，是吸收______的主要部位
（4）根部吸收水的无机盐可通过______．
He spent thirty minutes in finishing his homework.
A．It took him half an hour to finish his homework.
B．It takes him half an hour to finish his homework.
C．It cost him half an hour to finish his homework.
D．He spend half an hour to on finishing his homework.
