青少年必须养成的好习惯有[ ] ① 有计划的消费 ② 勤于劳动 ③节约时间 ④

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问题:

青少年必须养成的好习惯有 [ ]

① 有计划的消费

② 勤于劳动

③节约时间

④ 学好语文和外语

A、①②③

B、②③④

C、①②③④

D、①③④

考点:培养良好习惯
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今年春节期间我省天气异常寒冷,据报载,我省某镇一家居民六口于寒夜紧闭门窗,挤在房中用煤炉取暖,清晨发现六人昏迷不醒,经检查是“煤气中毒”.回答:

(1)煤气中毒指的是什么物质中毒?______

(2)房内充满煤气的原因是什么?______.

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Mrs Smith couldn't make the cake because she didn't have some of the necessary_______.[ ]

A. ingredients    

B. cream    

C. bread    

D. yogurt

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中华商务网讯:2011年中国将超北美成为全球液晶显示器第二大市场。生产液晶显示器的过程中使用的化学清洗剂NF3是一种温室气体,其存储能量的能力是CO2的12000~20000倍,在大气中的寿命可长达740年,以下是几种化学键的键能:

化学键N≡NF—FN—F
键能/(kJ·mol-1)941.7154.8283.0
 

下列说法中正确的是           (  )

A.过程N2(g)→2N(g)放出能量

B.过程N(g)+3F(g)→NF3(g)放出能量

C.反应N2(g)+3F2(g)→2NF3(g)的ΔH>0

D.NF3吸收能量后如果没有化学键的断裂与生成,仍可能发生化学反应

题型:选择题

Which of the following is a CORRECT statement of a member’s duty under the Code and Standards()

A. A member is required to comply only with applicable local laws, rules, regulations, or customs even though the CFA Institute Code and Standards may impose a higher degree of responsibility or a higher duty on the member.

B. A member who trades securities in a foreign securities market where no applicable local laws or stock exchange rules regulate the use of material nonpublic information may take investment action based on this information.

C. In the absence of specific applicable law or other regulatory requirements, the Code and Standards govern the member’s actions.

题型:选择题

回填土常用的夯实机具有()。

A、蛙式打夯机

B、履带式打夯机

C、推土机

D、内燃打夯机

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