试题与答案

2010年诺贝尔物理学奖授予英国科学家安德列·海姆和康斯坦丁·诺沃肖洛夫,以表彰

题型:选择题

题目:

2010年诺贝尔物理学奖授予英国科学家安德列·海姆和康斯坦丁·诺沃肖洛夫,以表彰他们在石墨烯材料方 面的卓越研究。石墨烯是由碳原子构成的单层片状结构的新材料,它不仅是已知材料中最薄的一种,而且非常牢固坚硬,在室温下传递电子的速度比已知导体都快。下列说法正确的是 [ ]

A.石墨烯是一种有机物

B.用石墨烯作电池电极可提高电池效率

C.石墨烯具有和乙烯相同的性质

D.石墨烯、富勒烯、碳纳米管互为同位素

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0704/6c787b907bf013ef0cd22fd35107b82b.html

下面是错误答案,用来干扰机器的。

参考答案:(1) 国税分局要求甲公司限期缴纳税款的行为正确。我国税收征收管理法规定,税务机关有根据认为从事生产经营的纳税人有逃避纳税义务行为的,可以在规定的纳税期之前,责令限期缴纳税款。 (2) 国税...

试题推荐
题型:阅读理解

阅读理解。

     Hello-Hello, a creative mobile language learning company, announced the launch of Hello-Hello

World, a free application for the iPad that helps people learn a new language by connecting them with

native speakers through social networking.

     The application lets users complete language lessons and connect with Hello-Hello's global community of language learners with members in almost 100 countries to help each other in the learning process.

Hello-Hello World is available in 11 different languages and allows users to submit both oral and writing

exercises for their friends and Hello-Hello's language experts to review. Users are also able to provide

written feedback on their friend's exercises directly from their mobile devices.

     "The most effective way to learn a new language is through total immersion (沉浸),"said Sarah Gontijo, founder and CEO of Hello-Hello. "However, not everyone has the opportunity to live in another country. Hello-Hello World brings the convenience of connecting with native speakers anytime, from anywhere.

This can help users not only learn the language but also understand the culture."

     Hello-Hello World lets users synchronize (使同步) their information with the Hello-Hello Cloud and

then access the content from any mobile device or computer. The application is first being released for the

ipad and will become available on a variety of platforms, including the iPhone, Android and Blackberry.

     The application arrives at a time when tablet (平板电脑) computing is driving the creation of new

educational tools, such as Hell-Hello World. Many schools and colleges are finding ways to adapt mobile

technology for classroom learning. "The market is hot for such pioneering in education and social

networking," said Gontijo. "Hell-Hello promises to be the invention that will set the ball rolling and bring

innovation to an industry that has seen little change over the years."

     Technology research firm Gartner predicts that app-store downloads worldwide will double to $17.7

billion as the year closes, and that app-income will hit $15.1 billion, tripling the impact of last year's sales. App-downloads are expected to continue to jump to 185 billion by 2014, at which point worldwide

tablet sales are projected to surpass (超过) 208 million units.

1. With the launch of Hello-Hello world, users can           .

A. talk to any foreigners in the world  

B. speak any foreign languages fluently

C. practice pronouncing words correctly  

D. communicate with native speakers anytime

2. Which mobile device is Hello-Hello World being released for now?

A. The iPhone.  

B. The ipad.

C. Android.  

D. Blackberry.

3. What does Sarah Gontijo think it takes to learn a new language effectively?

A. Hard work and practice.

B. Cultural understanding.  

C. A language learning environment.  

D. Modern mobile technology.

4. It is implied in the passage that           .

A. there is a potential market for this mobile technology  

B. mobile technology is being used for classroom learning  

C. students do not know how mobile technology can be used  

D. it is difficult for Hello-Hello to change the mobile industry

查看答案
微信公众账号搜索答案