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【简答题】
根据短文内容,判断正(T)误(F)。 New rules and behaviour standards (行为规范) for middle school students came out in March. Middle school is going to use a new way to decide who the top students are. The best students won't only have high marks. They will also be kids who don't dye (染) their hair, smoke or drink. The followings are some of the new rules. Tell the truth. Have you ever copied someone else's work in an exam? Don't do it again! That's not something an honest (诚实的) student should do. If you have played computer games for two hours in your room, don't tell your parents you have done homework. Do more at school. Good students love animals and care for other people. April is Bird Loving Month in China. Is your school doing anything to celebrate? You should join! In that way, you can learn more about animals and how to protect them. When more people work together, it makes it more fun for everyone. Have you ever quarreled (吵架) with your teammates when your basketball team lost? Only working together can make your team stronger. Be friendly to the people you are with. Try to think of others, not only yourself. Be open to new ideas. Have you ever thought that people could live on the moon? Maybe you'll discover EarthⅡsomeday. Don't look down on new ideas. Everyone's ideas are important. You should welcome them, because new ideas make life better for everyone. Protect yourself. Has someone ever taken money from one of your classmates? Don't let it happen to you. If you have to go home late, you should let your parents know. Use the Internet carefully. The Internet can be very useful for your studies. But some things on the Internet aren't good for kids, so try to look at web pages that are good for you. You can use the web for fun or homework. If you can't find any good web sites for children, here are two: http: //kids.eastday.com; http: //www.chinakids.net.com. (     ) 1. The school new rules will help kids by telling them what is right and what is wrong. (     ) 2. According to the passage, we know we should love animals and protect them. (     ) 3. Good web sites for children can be a waste of time. (     ) 4. As a student, we should tell the truth, even when we are wrong. (     ) 5. The passage tells us the new rules and standards about how to be a top student.
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【单选题】在我国,咯血的主要原因首推
A.
肺梗死
B.
肺结核
C.
肺炎
D.
矽肺
E.
恶性肿瘤转移
【简答题】(8分)现有A、B、C、D四种元素,A元素形成的—2价阴离子比氦原子的核外电子数多8个,B元素与A元素形成的一种化合物为淡黄色固体,该固体遇到空气能生成A的单质;C为原子核内有12个中子的金属元素,当2.4克C与足量热水反应时,在标准状况下放出气体2.24L,C形成正二价阳离子;D元素原子的M层上有7个电子。 (1)写出B、C两种元素的元素符号:B ,C ; (2)画出A 2- 的离子结构示意图:...
【单选题】在碱平衡表示叙述中不正确的是()。
A.
碱的强弱与碱的平衡常数有关,相同条件下平衡常数越大则碱度越大
B.
碱的强弱与溶剂的性质有关,溶剂给出质子的能力越大则碱度越大
C.
碱的强弱与溶剂的性质有关,溶剂给出质子的能力越小则碱度越大
D.
碱的强弱与碱的结构有关,碱越易接受质子则碱度越大
【判断题】销售毛利率反映了企业的销售成本与销售收入净额的比例关系,毛利率越大,说明在销售收入净额中销售成本所占比重越大,企业通过销售获取利润的能力越强。()
A.
正确
B.
错误
【简答题】现有A、B、C、D四种短周期元素,A元素形成的-2价阴离子比氦原子的核外电子数多8个,B元素与A元素形成的一种化合物为淡黄色固体,该固体遇到空气能生成A的单质;C为原子核内有12个中子的金属元素,当2.4克C与足量热水反应时,在标准状况下放出气体2.24L,C形成正二价阳离子;D元素原子的M层上有7个电子. (1)写出B、C两种元素的元素符号:B______,C______; (2)画出A 2- ...
【单选题】( )反映了企业税后净利润与企业销售收入的关系,是提高企业盈利能力的关键所在。
A.
总资产周转率
B.
净资产收益率
C.
销售净利率
D.
权益乘数
【判断题】销售毛利率反映了企业的销售成本与销售收入净额的比例关系。毛利率越大,说明在销售收入净额中销售成本所占比例越小,企业通过销售获取利润的能力越弱。( )
A.
正确
B.
错误
【简答题】现有A、B、C、D四种元素,A元素形成的-2价阴离子比氦原子的核外电子数多8个,B元素与A元素形成的一种化合物为淡黄色固体,该固体遇到空气能生成A的单质;C为原子核内有12个中子的金属元素,当2.4克C与足量热水反应时,在标准状况下放出气体2.24L,C形成正二价阳离子;D元素原子的M层上有7个电子。 (1)写出B、C两种元素的元素符号:B__________,C__________; (2)画出...
【简答题】现有A、B、C、D四种元素,A元素形成的—2价阴离子比氦原子的核外电子数多8个,B元素与A元素可组成一种化合物E,为淡黄色固体,该固体遇到空气能生成A的单质;C为原子核内有12个中子的金属元素,当2.4gC与足量热水反应时,在标准状况下放出气体2.24L,C形成正二价阳离子;D元素原子的M层上有7个电子。 (1)写出B、C两种元素的元素名称:B ,C ,指出D在周期表中的位置 。 (2)D的气态氢...
【单选题】在我国,咯血的主要原因首推
A.
肺梗死
B.
肺结核
C.
肺炎
D.
矽肺
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