具有抑制子宫及雌激素样作用的理气药是（） A.青皮 B.香附 C.枳实

肿瘤细胞恶性增殖主要是细胞内下列哪项因素增高所致（）。

A.cyclin

B.CDI

C.CDK

D.泛素

E.P53

2010年，张大兵率先带领团队利用基因工程重组技术成功研制具有我国自主知识产权的高效乙酰胆碱酯酶，基于该重组酶而研制出农药残留快速检测试剂盒。以下说法正确的是[ ]

A．用基因工程培育的抗虫植物也能抗病毒

B．基因工程可用来培育高产、稳产、品质优良和抗逆性强的作物

C．基因工程在畜牧业上的应用主要是培育体型巨大、品质优良的动物

D．科学家将必需氨基酸含量多的蛋白质导入植物中，或者改变这些氨基酸的合成途径中某种关键酶的活性，以提高氨基酸的含量

下列关于应对全球变暖的措施，合理的是

A．加大海水淡化力度，控制海平面上升

B．人类应停止发展，避免因人为原因导致的全球气候变暖

C．全球变暖会导致蒸发量增大，地球会变得更干旱，因此各地应及时地调整农业结构，大力发展畜牧业

D．沿海地势较低的国家修建拦海大坝，或将居民向地势较高处迁移

When I was about 10, I was walking down the street with my mother. She stopped to speak to Mr. Lee. I knew I could see Mr. Lee anytime around the neighborhood, so I just stood there. After we passed him, my mother stopped and said something unforgettable, "You let that be the last time you ever walk by somebody you know without opening your mouth to speak, because even a dog can wag its tail when it passes you on the street. "That sentence sounds simple but it made me become who I am.

At work, I used to say hello to the president of the company and ask him how our business was doing. But I also spoke to the people in the cafe and people who cleaned the buildings, and asked them how their children were doing, for every single person deserves to be accepted, no matter how humble(低微的)they are. I remember that after a few years of passing by the president, I had the courage to ask him for a chat. We had a great talk. At some point, when I asked him how far he thought I could go in his company, he said that if I wanted to, I could get all the way to his seat.

I've become vice-president, but that hasn't changed how I treat people. I speak to people wherever I am. Speaking to people creates a pathway into their world, and it lets them come into mine, too.

The day you speak to someone who has his head down and then see him lift it up and smile, you will realize how powerful it is just to open your mouth and say hello.

小题1:What is the best title for this passage?

A．The power of being talkative

B．My mother's influence on me

C．The power of saying hello

D．My way to become vice-president小题2: It is implied in the first paragraph that        .

A．the writer didn't like Mr. Lee

B．the writer didn't say hello to Mr. Lee on that occasion

C．the writer didn't get along well with his mother

D．the writer's mother stopped to say hello to everyone she met小题3: What can we learn from the second paragraph?

A．The writer didn't say hello to everyone in the company.

B．The writer made a very good impression on the president of the company.

C．The president of the company thought the writer was much better than him.

D．The president of the company actually didn't like the writer at all.小题4:For the writer, saying hello to others          .

A．is a way to get what he wants

B．has become a habit and a way of life

C．is a way to show respect for his mother

D．is important in making him remembered小题5:According to Paragraph 3, in the writer’s opinion, speaking to others can       .

A．make our world much better

B．make people much happier every day

C．help people understand each other better

D．help people work much better

煤中有一部分碳不参加燃烧，其含量越多反而使煤的发热量越低，它们是（）

A.C

B.CaCO₃

C.CO

D.MgCO₃