混凝土管涵一般可分为( )。A.箱式 B.三铰式管涵 C.四铰式管涵 D.刚性管涵

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问题:

混凝土管涵一般可分为( )。

A.箱式

B.三铰式管涵

C.四铰式管涵

D.刚性管涵

E.钢筋混凝土

考点:造价工程师建设工程技术与计量(土建)建设工程技术与计量(土建工程部分)
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根据现行宪法和法律的规定,下列表述哪些正确( )。

A.公民在年老、疾病或者丧失劳动能力的情况下,有从国家和社会获得物质帮助的权利

B.劳动、受教育和依法服兵役都既是公民的基本权利又是公民的基本义务

C.我国的民族自治地方包括自治区、自治州和自治县

D.民族自治地方的国家机关即民族自治机关

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A couple from Miami, Bill and Simone Butler, spent sixty –six days in a life-raft (救生艇) in the seas of Central America after their boat sank.

Twenty-one days after they left Panama in their boat, Simony, they met some whales (鲸鱼). “They started to hit the side of the boat,” said Bill, “and then suddenly we heard water.” Two minutes later, the boat was sinking. They jumped into the life-raft and watched the boat go under the water.

For twenty days they had tins of food, biscuits, and bottles of water. They also had a fishing-line and a machine to make salt water into drinking water— two things which saved their lives. They caught eight to ten fish a day and ate them raw (生的). Then the line broke. “So we had no more fish until something very strange happened. Some sharks (鲨鱼) came to feed, and the fish under the raft were afraid and came to the surface. I caught them with my hands.”

About twenty ships passed them, but no one saw them. After fifty days at sea their life-raft was beginning to break up. Then suddenly it was all over. A fishing boat saw them and picked them up. They couldn’t stand up. So the captain carried them onto his boat and took them to Costa Rica. Their two months at sea was over.

68. Bill and Simone were traveling ______ when they met some whales.

A. in a life-raft    B. in Miami     C. in Simony     D. in Panama

69. During their days at sea, ______ saved their lives.

A. tins of food and bottles of water    B. a fishing-line and a machine

C. whales and sharks               D. Twenty passing ships

70. After their boat sank, the couple ______.

A. jumped into the life-raft          B. heard water

C. watched the boat go under water   D. stayed in the life-raft

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报告行文时主要采用哪两种表达方式?()

A.叙述和说明

B.议论和说明

C.议论和叙述

D.陈述和议论

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原型化方法是信息系统开发的有效方法之一,下述哪些是实施原型化方法时必须具备的条件 Ⅰ.需要有经验的原型化人员   Ⅱ.有快速的开发工具   Ⅲ.有原型系统的积累

A.只有Ⅰ

B.只有Ⅱ

C.I和Ⅱ

D.都是

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专业的CW测试设备的采样方式有三种:按时间采样;按脉冲采样;按距离采样。按距离采样进行测试时,能够严格满足李氏定理40个波长采样36~50个样点的要求,测量准确度很高。距离采样方法对于车速要求不严格,但是存在一个车速上限。

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