水中硒以无机态存在的形式主要有哪几种？

一天中午放学时，八年级学生小凡的父亲冒雨送伞。小凡接过雨伞，瞪着眼对父亲说：“你来干什么?让同学看见了，我多难堪。”

假如你是小凡的同学，请运用所学知识劝说小凡应该怎样做一个孝敬父母的好孩子。

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几乎所有细菌细胞都共有的构造包括细胞壁、细胞膜、细胞质和（）等。

督察长不得有下列行为( )。

A．擅离职守，无故不履行职责

B．违反规定授权他人代为履行职责

C．兼任可能影响其独立性的职务或者从事可能影响其独立性的活动

D．对基金及公司运作中存在的违法违规行为或者重大风险隐患隐瞒木报或者作出虚假报告

阅读下面的短文，然后按照要求写一篇150词左右的英语短文。

Nowadays, the term " sense of happiness" has been repeatedly mentioned in various medias. During the National Day holidays, CCTV did a nation-wide survey by asking random passers-by the question " Are you happy now? What exactly is happiness in your eyes?" The survey aroused a heated discussion across the country and people from all walks of life expressed their opinions.

" I would say I'm pretty happy at present because my dear daughter has graduated from college and found herself a good job. " said a woman in her fifties with a big smile on her face.

Though it seemed that most people said they were happy, different voices were still heard and should not be ignored. There was a migrant worker(农民工) whose answer to the question was widely spread online. When asked if he was happy, he said " My family name is Zeng", showing his determination to refuse the interview as well as his annoyance to mention happiness.

The brand-new Chinese Nobel Prize winner Mo Yan answered " I don't know " in an interview when he was asked the same question: Are you happy?

[写作内容]

1.以约30个词概括上文的主要内容。

2.以约120个词就“幸福”的话题谈谈你的想法，内容包括：

（1）目前你是否感到幸福及其原因；

（2）请简述到现在为止让你觉得最幸福的一件事情；

（3）谈谈你对幸福的理解。

[写作要求]

1作文中可以使用亲身经历或虚构的故事．也可以参照阅读材料的内容，但不得直接引用原文中的句子。

2作文中不能出现真实姓名和学校名称。

[评分标准]

概括准确，语言规范，内容合适，语篇连贯。

以下关于滤过除菌的叙述，正确的是（）

A.用微孔薄膜滤过除菌，薄膜滤材的孔径一般应选用0.22um以下的

B.垂熔玻璃滤器有多种规格，均可以作为滤过除菌器使用

C.G6号垂熔玻璃滤器可滤除细菌

D.G3、G4号垂熔玻璃滤器可滤除细菌

E.板框式压滤机不能用作滤过除菌