1987年联合国世界环境与发展委员会发表( )，提出可持续发展的定义是：“既满足当

读一读，选一选，填一填。   

桃花  故事  粉红  月亮

雪白   美丽    奇妙    梨花     

                                           mǎn 

1．春天到了，村子里到处开满了(        )的(       )、(       )的(       )。     

2．夜晚，(       )的(      )挂在天上，妈妈给我讲着(      )的(      )。

图像的定性分析是指（）

A.用肉眼、显微镜、电镜等观察图像的结构并用文字描述图像的结构性质和特点

B.用肉眼、显微镜、电镜等观察图像的结构并用数字描述图像的结构特点

C.用肉眼、显微镜、电镜等观察图像的结构并用灰度的表达形式描述图像的结构特点

D.用量化的方法以灰度的表达形式对图像中各种结构信息的定性描述

E.以上都不对

Lisa was running late. Lisa, 25, had a lot to do at work, plus visitors on the way : her parents were coming in for Thanksgiving from her hometown. But as she hurried down the subway stairs, she started to feel uncomfortably warn. By the time she got to the platform, Lisa felt weak and tired—maybe it hadn’t been a good idea to give blood the night before, she thought. She rested herself against a post close to the tracks. Several yards away, Frank, 43, and his girlfriend, Jennifer, found a spot close to where the front of the train would stop. They were deep in discussion about a house they were thinking of buying. But when he heard the scream, followed by someone yelling, "Oh, my God, she fell in!" Frank didn’t hesitate. He jumped down to the tracks and ran some 40 feet toward the body lying on the rails. "No! Not you!" his girlfriend screamed after him. She was right to be alarmed. By the time Frank reached Lisa, he could feel the tracks shaking and see the light coming. The train was about 20 seconds from the station.
It was hard to lift her. She was just out. But he managed to raise her the four feet to the platform so that bystanders could hold her by the grins and drag her away from the edge. That was where Lisa briefly regained consciousness, felt herself being pulled along the ground, and saw someone else holding her purse. Lisa thought she’d been robbed. A woman held her hand and a man gave his shirt to help stop the blood pouring from her head. She tried to talk but she couldn’t, and that was when she realized how much pain she was in. Police and fire officials soon arrived, and Frank told the story to an officer. Jennifer said her boyfriend was calm on their 40 minute train ride downtown—just as he had been seconds after the rescue, which made her think about her reaction at the time. "I saw the train coming and I was thinking he was going to die", she explained.

The passage is intended to ______.

A. warn us of the danger in the subway
B. show us how to save people in the subway
C. tell us about a subway rescue
D. report a traffic accident

多台电气设备采用保护接零时，保护零线应该（）

A.可以串接

B.单独连接

C.接地

D.不能单独连接

因货物被抛弃、遗弃、泄漏、落水等原由而造成的货物损失称为（），但正常的短量除外。

A.货物短缺

B.货物损坏

C.货物灭失