题干

取锌、铜的混合物8g与154.7g稀硫酸恰好完全反应,称得剩余物质的总质量为162.5g.请计算:
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同类题2

根据短文内容,选择最佳答案。
    “Did you hear what happened to Adam Last Friday?” Lindsey whispers to Tori.
    With her eyes shining, Tori brags, “You bet I did, Sean told me two days ago.”
    Who are Lindsey and Tori talking about? It just happened to be yours truly, Adam Freedman. I can tell you that what they are saying is (a) not nice and (b) not even true. Still, Lindsey and Tori aren't very different from most students here at Linton High School, including me. Many of our conversations are gossip(闲话). I have noticed three effects of gossip: it can hurt people, it can give gossipers a strange kind of satisfaction, and it can cause social pressures in a group.
    An important negative effect of gossip is that it can hurt the person being talked about. Usually, gossip spreads information about a topic-breakups, trouble at home, even dropping out-that a person would rather keep secret. The more embarrassing or shameful the secret is, the juicier the gossip it makes. Probably the worst type of gossip is the absolute lie. People often think of gossipers as harmless, but cruel lies can cause pain.
    If we know that gossip can be harmful, then why do so many of us do it? Theanswer lies in another effect of gossip: the satisfaction it gives us. Sharing the latest rumor(传言) can make a person feel important because he or she knows something that others don't. Similarly, hearing the latest rumor can make a person feel like part of the “in group.” In other words, gossip is satisfying because it gives people a sense of belonging or even superiority(优越感).
    Gossip also can have a third effect: it strengthens unwritten, unspoken rules about how people should act. Professor David Wilson explains that gossip is important in policing behaviors in a group. Translated into high school terms, this means that if everybody you hang around with is laughing at what John wore or what Jane said, then you can bet that wearing or saying something similar will get you the same kind of negative attention. The dos and don'ts conveyed through gossip will never show up in any student handbook.
    The effects of gossip vary depending on the situation. The next time you feel the urge to spread the latest news, thing about why you want to gossip and what effects your “juicy story” might have.

同类题5

根据以下材料,回答问题。

材料一:马克思、恩格斯总结归纳了工人运动的经验,创造了科学社会主义。当科学社会主义诞生之时,它只是众多社会主义流派中的一个,并未马上得到大多数人的理解和接受。但是它的科学性决定了它必然成为社会主义学说中最有生命力和最有影响力的理论。之所以说它是科学的,基本根据足:它奠基于辩证唯物主义和历史唯物主义的真理之上;它从实践中找到了自己所依靠的物质力量——无产阶级;它合理地继承了人类知识的精华;不割断历史,但又不拘泥于传统;它遵循实事求是的原则,抛弃了一切主观臆测。这一切正是它区别于其他所有社会主义流派的地方,是它大放异彩、长存不败的根源所在。

——《历史学科专题讲座》

材料二:目前俄国的特点是从革命的第一阶段过渡到革命的第二阶段,第一阶段由于无产阶级的觉悟性和组织性不够,政权落到了资产阶级手中,第二阶段则应当使政权转到无产阶级和贫苦农民阶层手中。……不要议会制共和国,而要从下到上由全国的工人、雇农和农民代表苏维埃组成的共和国

——列宁《四月提纲》

材料三:***同志最伟大的历史功绩,是把马克思列宁主义基本原理同中国具体实际结合起来,领导我们党和人民,找到了一条新民主主义革命的正确道路,完成反帝反封建的任务,结束了中国半殖民地半封建社会的历史,建立了中华人民共和国,确立了社会主义制度。接着,他又从中国实际出发,开始探索社会主义建设的道路

——江泽民