取一段带叶的冬青枝条,将下端插入滴有红墨水的水中,过一段时间切开枝条发现变红的部

题型:选择题

问题:

取一段带叶的冬青枝条,将下端插入滴有红墨水的水中,过一段时间切开枝条发现变红的部位是[ ]

A.韧皮部          

B.形成层          

C.木质部            

D.髓

考点:茎的结构
题型:选择题

国民经济评价着眼于项目对社会提供的有用产品和服务,以及项目所耗费的全社会的用资源来考察项目的效益和费用,因此,效益和费用中不包括()。

A.间接效益 

B.税金 

C.国内贷款利息 

D.间接费用 

E.补贴

题型:选择题

食用冻豆腐时,发现豆腐内有许多小孔,在小孔形成的过程中,发生的主要物态变化是(  )

A.凝固和熔化

B.液化和升华

C.凝华和熔化

D.凝固和汽化

题型:选择题

More than seven hundred years ago, the Prince of Wales had a very big and brave dog called Gelert. One day the Prince wanted to go hunt-ing with his men. He told his dog to stay at home and look after his baby son. The baby was in a wooden cradle, which was like a small bed. When the Prince came back from hunt-ing, Gelert ran out to meet his master. He wagged his tail and jumped up to put his paws on the Prince's chest. Then the Prince saw the blood on Gelert's jaws and head.

"What have you done?" the Prince said. He rushed into his house and looked for his baby son. The cradle was lying on its side on the floor. The clothes were torn and there was blood on them.

"So you have killed my son?" the Prince said angrily. "You unfaithful dog!" He took out his sword and killed the dog. Just as Gelert was dying, he managed to bark. Then the Prince heard a baby call to the dog.

The Prince ran out of the house and saw his son lying on the ground unhurt. Near him was a dead wolf. Then the Prince knew that Gelert had defended the baby and killed the wolf.

The Prince ran back into the house but he was too late. Gelert was dead. The Prince was very sad indeed. Tears ran down his face when he realized 'he had killed his faith-ful friend. The Prince carried the body of his brave dog to the top of a mountain and buried him there. After this, the Prince never smiled again. Every morning at dawn, he walked up the mountain and stood by the dog's grave for a few minutes.

If you go to Mount Snowdon in Wales, people will show you where Gelert is buried. There is a sign by his grave. It reminds peo-ple of a brave and faithful dog.

小题1:

Gelert was the dog of the Prince of ___.

A.Scotland

B.England

C.Ireland

D.Wales小题2:

The Prince told the dog to _____ when he was leaving.

A.watch the door

B.take care of his baby at home

C.welcome his friends

D.stop the strangers小题3:

The dog was very ____ when his master came back from hunting.

A.glad

B.fearful

C.afraid

D.tired小题4:

The Prince never smiled again because __

A.the wolf was killed by Gelert

B.he had buried the dog on the top of mountain

C.he had killed his faithful friend Gelert

D.Gelert had killed his baby son

题型:选择题

超滤浓差极化

题型:选择题

南方电子电气有限公司(建设单位)新建液晶屏(1-CD)生产车间,其生产线由建设单位从国外订购,A施工单位承包安装。A施工单位进场时,生产车间的土建工程和机电配套工程(B施工单位承建)已基本完工。A施工单位按合同工期要求,与建设单位、生产线供应商和B施工单位洽谈,编制了LCD生产线安装网络计划工作的逻辑关系及工作持续时间表(见表2-1)。
LCD生产线安装网络计划工作逻辑关系及持续时间

工作内容 工作代号 紧前工作 持续时间/天
进场施工生产进场 A - 20
开工后生产线进场 B - 60
基础检测验收 C A 10
配电装置及线路安装 D A 30
LCD生产线组装固定 E BC 75
配套设备及电器控制系统安装 F BC 40
LCD生产线试车调整 G DE 30
电器控制系统检测 H DEF 25
联动调试、试运行、验收 I GH 15
A施工单位在设备基础检验时,发现少量基础与安装施工图不符,B施工单位进行了整改,重新浇捣了混凝土基础,经检验合格,但影响了工期,使基础检验持续时间为30d。
LCD生产线的安装正值夏季,由于台风影响航运,使LCD生产线设备到达安装现场比计划晚7d。A施工单位按照建设单位的要求,调整进度计划,仍按合同规定的工期完成。
问题

分析影响工期的关键工作是哪几个总工期需多少天

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