下列不属于公安工作整体上特点的是( )。 A．集中性和分散性相结合 B．坚持批评和

彩色多普勒诊断房间隔卵圆孔未闭的血流方向为

A.左向右分流 

B.右向左分流 

C.双向分流 

D.如无彩色血流通过，即无卵圆孔未闭 

E.左向右分流束直径小于5mm 

欲测定烟雾中的SO₂含量，可做下列实验：取100 L该空气（标准状况下），通过盛放100 mL过氧化氢 (H₂O₂)水溶液的吸收瓶，使它们充分反应，生成硫酸。在吸收后的水溶液中加入BaCl₂溶液，生成白色沉淀， 经测定其质量为11.65 g。

(1)试写出SO₂和H₂O₂反应的离子方程式。

____________________________________。

(2)写出H₂SO₄与BaCl₂反应的离子方程式。

____________________________________。

(3)求100 L空气中SO₂的体积分数。

在感官品评时，捕捉样品的特征和分辨样品的差别常常靠（）而不是口尝。

阅读理解。

      What will life in the future be like?Will it be much better than it is now? And what will we be able to

do 10,20 or 30 years later? Let's just close our eyes and think !

     Genetic Engineering

       Cenetic engineering will help us create the perfect human.  Babies will grow up to do slam dunks like Yao Ming or look like Cecilia Cheung.

         Also,we will be able to mix( 杂交)  plants and animals !  But do you want your dog to be a tree?

     The Dead

          In the future,we will be able to bring the dead back to life.  Then each family can meet and talk

with its dead family members. It will be like living with ghosts.

    On television people will see Albert Einstein, Marilyn Monroe, Confucius, Elvis Presley, and

Shakespeare talking with each other!

     Long-Iiving People

      Over the next 20 t0 50 years,it will become harder to tell the difference between human and machine. All body parts will be replaceable.We will then be able to make fake (假的) people.

       We will make a copy of ourselves,so we will appear to be alive long after we are dead.  A few

decades later,people will find ways to transfer (转移)  their spirit (精神 )  to the new body.

Nanobots

      We will be able to build nanobots (纳米机器人) to travel through our body. Also,nanobots will be

used when we are sick.

      For example,when we have a stomachache,we will swallow a very small robot and it will travel

through our stomach,taking video of what's happening there.  Then we can show the video to help the doctor diagnose (诊断)  our problem.

Computers

     Computers help us remember,calculate,and enjoy ourselves. In the future,computers will be able to

show their feelings. They will be able to think better than the human mind.

     After television became popular,many people soon became couch potatoes. It is not surprising that

many people have become overweight; and things will get worse in the future !

      We will be more and more interested in computers and the Internet,spending more and more time in

front of computers and forget what our real needs are.  Many of us will become super couch potatoes

and weight 250kg!

1. Which of the following dream can Genetic Engineering make come true? 

A. Plants can be mixed with animals.

B. The dead can come back to life.

C. All body parts will be replaceable.

D. Computers can think.

2.  People in the future will live longer because of the following reasons EXCEPT

A. we can replace our broken parts by good ones

B. we can make a copy of ourselves

C. we can create perfect human 

D. we can find ways to transfer our spirit

3. "Couch potatoes"refer to _________.  

A. special potatoes

B. people who like eating potatoes

C. people who like sitting in couch

D. people who spend much time watching TV

4. What cause(s) people's overweight in the future? 

A. Genetic Engineering.          

B. Nanobots.

C. Computers.          

D. Potatoes.

鉴别龈袋与牙周袋，下列哪项最正确（）

A.牙龈的炎症程度

B.牙龈冠向增生、肥大

C.龈缘的位置

D.结合上皮是否根向移植

E.袋的深浅