曹老师教学《圆的周长》时，讲述了我国古代数学家祖冲之在计算圆周率上的卓越贡献，同学们

推土机推土方定额要区别()分别计算工程量

A.何种品牌推土机

B.土壤的松实程度

C.推土机功率

D.推土机运距

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Speaking in public is most people’s least favorite thing. The reason is that we are all afraid of making foods of ourselves.   66  .

But stop biting your finger-mails. Public speaking is easy. It’s just plain talking, and you talk all the time. Although I’m basically shy (honest!). I’ve been making speeches and talking on radio and television for more than 30 years. And I can tell you that public speaking is not a “gift” like musical talent．_ 67  . Here are some of the lessons I have learned:

Your audience is going to come away with one or two of your main ideas．One or two．Not tenor 20．  68 ．And if you don't have a clear idea of what you want to say, there's no way your audience will．  69  —how you are going to open, what major points you want to make and how you're going to close．

When I do a radio or TV piece, I often write the last sentence first．___70___．A strong close is critical; the last thing you say is what your audience will most likely remember．

The standard length of a vaudeville act is usually 12 minutes．If all those performers singing and dancing their hearts out couldn't go on longer without boring the audience, what makes you think you can?

A．Some people are born to be good at making speech

B．Anybody who can talk can speak in public

C．Try to relax yourself before making the speech

D．The more important the speech is, the more frightened we become E．It you can't express in a sentence or two what you intend to get across, then your speech is not focused well enough

F．When you know where you're headed, you can choose any route to get there

G．No matter how long or short your speech is, you've got to get your ducks in a row

某生产企业为增值税一般纳税人，2013年有关经营情况和纳税情况如下：（1）销售收入230万元，销售成本120万元。（2）投资收益共计100万元，其中50万为国债持有到期的利息收入，另外50万元为境外分回的投资收益（境外所得税税率为20%）。（3）销售费用60元，其中广告费5万元、业务宣传费34.5万元；管理费用40万元，其中业务招待费5.5万元，另有计提的环境保护资金30万元，后经董事会决定投入生产经营中使用；财务费用5万元。（4）计入成本费用的工资总额为80万元，其中残疾人工资为12万元。（5）12月购入一批安全生产专用设备，投资额共计20万元。要求：根据上述资料，分析回答下列小题。

下列选项中，不可以在计算企业所得税前加计扣除的是（）。

A.从事符合条件的环境保护所得

B.符合条件的技术转让所得

C.残疾人员的工资

D.不符合资本化条件的研究开发费用

有关肿瘤免疫的描述，哪项是错误的（）。

A.体液免疫起主要作用

B.癌组织内大量淋巴细胞浸润是预后较好的指标

C.恶性肿瘤可以破坏宿主的免疫功能

D.免疫功能低下的患者容易发生恶性肿瘤

E.艾滋病患者恶性肿瘤的发生率升高

X线诊断大叶性肺炎最正确的是（）

A.右肺上野大片状阴影，其中可见多个小透亮区

B.右肺中野大片状阴影，左上可见透亮区

C.两肺上野斑片状阴影，左上可见透亮区

D.右肺中野大片状阴影，上缘清楚，外下缘模糊，其中可见含气支气管

E.左下肺圆形阴影，边缘模糊