《安全生产法》是我国众多的安全生产法律、行政法规中首先设定( )的法律。A．刑事责

任务型阅读。（每小题2分，共6分）

阅读下文并回答问题。

People do not usually like floods but some farmers need floods when their fields are too dry.When there is a flood, the water carries mud and sand from the river bed to the field near the river. When the water goes away, the mud and sand become good soil.

People in many countries tell stories about a very big flood. The flood covered the world. Here is just one of those stories.

A long , long time ago there was a man called Noah(诺亚). He lived with his wife, his three sons and his sons’ wives. One day, Noah heard a voice. It said: “Noah, soon there will be a big flood. You must build a boat. You must put two of every animal and bird in the boat. Many, many people will die in the flood but you and your family will be all right.”

Noah and his family built a boat. They put two of every animal and bird in their boat. They put food in the boat, too. Then it started to rain. It rained for 40 days and 40 nights. The water covered the world. The hills and mountains looked like islands. Noah’s boat stopped on the top of the mountain. At last the rain stopped and the flood went away. There was a beautiful rainbow in the sky. And the animals and birds left Noah’s boat. They ran, jumped, walked and flew away to live on the mountains.

According to the story, answer the following questions:

小题1:Can floods be good for farmers?

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小题2:What did Noah build to protect his family from the flood?

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小题3:How long did the rain last?

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制作整铸支架时，支架铸道设置原则有（）

A.便于切割铸道

B.便于合金液流动迅速

C.有利于杂质和气体的挥发和外流

D.熔模位于铸型的热中心区

E.铸道宜少不宜多A.便于切割铸道

B.便于合金液流动迅速

C.有利于杂质和气体的挥发和外流

D.熔模位于铸型的热中心区

E.铸道宜少不宜多

如图是某种含有C、H、O元素的有机物简易球棍模型。下列关于该有机物的说法正确的是(   )

A．该物质属于酯类

B．分子式为C₃H₈O₂

C．该物质在酸性条件下水解生成乙酸

D．该物质含有双键，能跟氢气发生加成反应

骨骼核素显像的适应证有()

A．寻找恶性肿瘤的早期转移病灶

B．判断骨肿瘤的部位、范围及确定治疗方案

C．诊断外伤性骨折病变

D．早期骨髓炎与蜂窝织炎鉴别诊断

E．对关节疾病、代谢性骨病等早期判断

简述在Flash中使用元件进行动画设计的主要优点。