同一个意思可以有多种表达。如“每个人都是有缺点或有缺陷的”可以说成“每个人都是被

10名高血压患者服用某种降压药，比较服药前后平均血压有无差别，可进行（）

A.成组设计检验

B.成组设计t检验

C.配对设计u检验

D.配对设计t检验

E.配对设计γ²检验

镜头一：在公共汽车上，一中年妇女提着带鱼上车，蹭脏了中学生赵刚的新校服。中年妇女说：“衣服脏了没关系，回家洗洗就行了。”

赵刚笑了：“我该说的话都让您说了，我得说对不起了。”众人向赵刚投来赞许的目光，中年妇女也被这幽默的批评羞红了脸。

镜头二：公共汽车一个急刹车，乘客李某重心前移，踩了学生陈伟的脚。李某忙说：“对不起。”“对不起就行啦，说得轻巧！”陈伟得理不让人。“你说怎样，我又不是故意的。”“不是故意的，你也让我踩一下！”陈伟没等说完就狠很地踩了李某一下，惊叫声、指责声顿时响成一团……

根据材料回答下面的问题：

（1）赵刚和陈伟的处理方法有何不同？你赞同谁的做法？为什么？

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（2）赵刚和陈伟的做法对我们有什么启示？

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（3）生活中你可曾遇到类似的情景？你是怎么处理的？

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+5，+12，135这样的数是（    ），-7，-45，-320这样的数是（    ）。

某企业有玻璃器皿生产车间。该企业的玻璃器皿制造分为烧制玻璃熔液、吹制成型和退火处理三道主要工序，烧制玻璃溶液的主要装置是玻璃熔化池炉。烧制时，从炉顶部侧面人工加入石英砂(二氧化硅)、纯碱(氢氧化钠)、三氧化二砷等原料，用重油和煤气作燃料烧至1300～1700℃，从炉底侧面排出玻璃熔液。玻璃器皿的生产车间厂房为钢筋混凝土框架结构，房顶是水泥预制板。厂房内有46t玻璃熔化池炉1座，炉高6 m，炉顶距厂房钢制房梁1.7 m，炉底高出地面15 m。距炉出料口3 m处是玻璃器皿自动吹制成型机和退火炉。煤气调压站距厂房直线距离15 m，重油储罐距厂房直线距离15 m。车间内有员工20人正在工作。由于熔化池炉超期服役，造成炉顶内拱耐火砖损坏，烈焰冲出炉顶近1 m，炉两侧的耐火砖也已变形，随时有发生溃炉的可能。2008年6月11日，当地政府安全生产监督管理部门在进行监督检查时；发现该炉存在重大事故隐患；当即向企业发出暂时停炉、停产的指令。
根据以上场景，回答下列问题

根据《生产过程危险和有害因素分类与代码》(GB/T 13861)的规定，指出该车间存在的危险和有害因素。

Last year, I met a little boy to whom my heart went out. He would talk to me every single day, and always seemed to have a smile on his face. His problem was that he stuttered (口吃) extremely badly when he tried to talk. It was really hard to understand what he was saying, although he loved to tell big tales!

One morning, I was talking to the teachers who ran the school store. The boy stopped by and said hello to all of us. Afterwards they told me that the boy would stop every day to ask if they would be there the next day. But of course, he never had money to buy anything.

I decided that I would get him a little something just as a surprise. So I picked out a pencil, a rubber, and a small notebook for just $1.00. I cannot describe the look on his face when I gave him the three little things. Then, without a stutter, he loudly said, "Thank you so much!" and just kept repeating, "Thank you! Thank you!" He gave me a big hug before going off to class.

I was touched to see someone appreciate something that much. As he walked off, he was showing his new stuff to other kids walking to class. I have to say that I have never spent a dollar that would mean so much to me.

小题1:Why did the boy never buy anything from the store?

A．Because he couldn’t make himself understood.

B．Because the teachers were unwilling to sell him anything.

C．Because he couldn’t afford anything.

D．Because he could never decide what to buy.小题2:What do we learn from the third paragraph?

A．Actually the boy had no stutter at all.

B．The boy was too excited to stutter at the moment.

C．What the author had bought helped the boy speak normally.

D．The author wanted to find out whether the boy really had a stutter.小题3:Which would be the best title for the passage?

A．A Stuttering Boy

B．Kindness Can Do Wonders

C．One Dollar Can Buy Anything

D．The Best Dollar I Have Spent小题4:What is the boy’s attitude to his life?

A．active

B．passive

C．disappointed

D．fearful