下列有关金属元素特征的叙述中正确的是 ( )

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A：金属元素的原子只有还原性，离子只有氧化性

B：金属元素在化合物中一定显正价

C：金属元素在不同化合物中的化合价均不同

D：金属单质在常温下都是金属晶体

上一题下一题 0.0难度选择题更新时间:2019-07-20 11:56:38

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B

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为了使同学们更加他康快乐地成长。学校决定向同学们征求建议。假如你是刘波，请根据下面表格提示，以“Suggestions for a Better School Life”为题，用英语向校长写一封80词左右的建议信。注意:①文中应包含所有要点，可适当发挥;②语句流畅，使行文连贯;③不能出现真实的校名和姓名;④开头和结尾己给出，不计入总词数。

Our school

*open the library more often *organize(组织) more after-class activities

*give us more time for sports *organize fewer tests

Our teacher

*make classes more interesting *talk less but more clearly in class

*finish classes on time *give us less homework

Suggestions for a Better School Life

Dear Headmaster,

I'm very glad to write a letter to you. These days we are talking about how to have a better school life. Here are some of my suggestions. First, I hope our school will

Hope my suggestions will be helpful. Thanks for reading my letter!

Yours sincerely

Liu Bo

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