补全对话
从方框中选择适当的句子完成下面的对话，并将其序号填在横线上
A: Hey, you look mad. What’s wrong?
B：I．．．I just can’t stand that terrible driver. He is so．．．
A：      【小题1】      Oh, would you like something to drink, coffee or cola?
B：Neither. A cup of water is OK.
A：Here you are. (one minute later)       【小题2】      
B：Yeah, much better.
A：So what exactly happened to you?
B：Just now I was riding my bike along the road. A car passed me quickly and suddenly stopped one meter away from me. At the same time there was another car coming in the other direction(方向), I had to brake(刹车)hard and then I hit the person on another bike.
A：      【小题3】       
B：Luckily no. But we both fell off our bike.
A：       【小题4】       
B：No, no. I got angry just because the driver drove off without saying anything.
A：      【小题5】        

A: What’s wrong ? B: Please be calm and take it easy. C: That’s really rude. D: I am sorry to hear that. E: That’s why you are so angry. F: Are you better now? G: Did anybody get hurt?

 

（9分）某同学的肝功能检验结果显示：乙肝抗原呈阴性(－)，乙肝抗体呈阳性(＋)，（说明：“＋”表示有，“－”表示没有）。请回答下列有关问题：
（1）该同学并没有注射过乙肝疫苗，就此检验结果请你分析可能的原因是          。
（2）用图解表示乙肝病毒（含有DNA）感染人体过程中的遗传信息的流动方向：     。
（3）由乙肝病毒外壳蛋白制成的乙肝疫苗，注入机体之后，将作为__________物质，使__________被激活而增殖分化形成浆细胞和__________。
（4）该同学在踢足球时不小心被铁钉扎破了脚，及时注射了破伤风抗毒素进行治疗，已知破伤风杆菌可阻止神经末梢释放甘氨酸，因而能引起肌肉痉挛和惊厥。据此分析甘氨酸相当于一种________，它能使下一个神经元的     信号向    信号转换过程受阻。

If someone is lost in a forest( 森林 ), he needs only study the trees around him carefully to find his way. On this half of the earth, he will find that the side of the tree with the most leaves and branches(树枝 ) is the south side. Also, by checking the tops of the trees, he will find that they lean(倾斜 ) to the south too.
Another sign( 标志物) for him to know where he is going is found in the bark.( 树皮) That is brighter on the south side.The remanining(树桩 ) of a cut tree is also a finder, for its rings can give him another sign. The rings will be thinner on the south side and thicker on the north side.
One more sign: some very small plants grow at the foot of a tree and they point to the north.
【小题1】 The passage is mainly about __________.
how to find a big tree if one is lost in the forest.
How to cut down trees in the forest
How to find the direction(方向 )in the forest
How to grow trees in the forest .
【小题2】 From a cut tree we can know that ___________.

A．the direction is written on it

B．the rings will be thinner on the south side and thicker on the north side

C．the rings will be thinner on the south

D．its rings can send messages to you

【小题3】 The passage tells us __________ ways of finding the direction in the frorest.

A．three

B．four

C．five

D．six

A）根据括号中所给的汉语写出单词，使句子意思完整正确。
1. People ran in all ______(方向) in fear when the earthquake hit the city suddenly.                   
2. A video game will bring us ________(无尽的) hours of fun.
3. Water turns into ice if the temperature drops ______(低于) 0℃.
4. The boy was badly hurt in the traffic accident. He ________(几乎不) said a word when he was sent to the hospital.
5. Cities are getting much more ______(拥挤的) because of the new immigrants.  

如图所示，x轴正方向水平向右，y轴正方向竖直向上。在xOy平面内有与y轴平行的匀强电场，在半径为R的圆内还有与xOy平面垂直的匀强磁场。在圆的左边放置一带电微粒发射装置，它沿x轴正方向发射出一束具有相同质量m、电荷量q（q＞0)和初速度v的带电微粒。发射时，这束带电微粒分布在0＜y＜2R的区间内。已知重力加速度大小为g。
（1）从A点射出的带电微粒平行于x轴从C点进入有磁场区域，并从坐标原点O沿y轴负方向离开，求电场强度和磁感应强度的大小与方向。
（2）请指出这束带电微粒与x轴相交的区域，并说明理由。
（3）若这束带电微粒初速度变为2v，那么它们与x轴相交的区域又在哪里？并说明理由。