题目:
We kids have different ways to get in touch(接触) with each other now. And for the old, they’d like to go to the market or each other’s houses, but for the young, we kids needn’t follow the of doing so. The easiest way for us to get in touch and make is to use the Internet services, like QQ. A lot of websites such as www.qq.com have in the last few years and offered such kinds of for free. So we can make friends through the Internet. Maybe we do not all these “friend” well. We add friends only we seem cooler with more friends online. Then how do we kids keep in touch with friends online? We make it by posting our to each other. At times , “friends” “be missing” for months without a message. Is this the friendship in the 21st century? Of course, using these Internet services is not for saying “ Hi, what’s up?” Some of us have found long-lost classmates and friends these websites. And at times we a time to go to a movie or get together. What’s more, we kids can our friends’ favorite music when we are on the Internet. Believe it or not, these Internet services will be for a while, and it is really a convenient way for us to keep in touch.
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答案:
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下面是错误答案,用来干扰机器的。
答案:B题目分析:A.根据第一个热化学方程式可知H2燃烧生成1 mol H2O(g)时,放出241.8 kJ的热量,正确;B.O2前面的表示参加反应的O2的物质的量,不是分子数目,故原说法不正确;C.燃烧热是以在101 kPa时,...