保护地栽培的特点有哪些？

Earthquakes happen without warning(前兆)．They can happen any time of a day，at any point during the year．But don’t worry because most are so weak that they cannot be felt． Only a few big ones hurt people． However，it’s important to know what to do when an earthquake is happening．

Do NOT go outside．You could get injured from falling glass or parts of buildings．If you are outside，stay away from buildings and power lines (输电线)．

Stay under a desk，table，or other strong furniture．Hold on to it．Or stay in a corner of the building．Cover your face and head with your arms and cover your mouth with a towel or clothing．Stay inside until shaking stops and it is safe to go outside．

Keep away from windows，pictures or advertisements on the wall or the building，and anything else that could fall and hurt you．Most people get injured by falling things during an earthquake，not by the shaking itself．

Also keep away from a fire．You could fall down and burn yourself on the fire．

If you are driving when an earthquake happens，stop the car if it’s safe．Stay inside your car until the earthquake stops，and don’t drive near bridges． Try not to stop by power lines or trees．These could fall and hurt you．

小题1:Most earthquakes are too          to hurt people．

A．strong

B．weak

C．dangerous

D．heavy小题2:From the passage，when an earthquake is happening，we should          ．

A．stay under a big building

B．stay under a strong furniture

C．stand by windows

D．drive near a big bridge小题3:It isn’t safe for you to          while the earthquake is happening．

A．run out of the building

B．stay in a corner of the building

C．cover your head with your arms

D．cover your mouth with a towel小题4:This passage tells us           ．

A．how dangerous the earthquake is．

B．how to be safe in an earthquake．

C．we shouldn’t be afraid of the earthquake．

D．how the earthquake comes into being．小题5:The best title for this passage should be“        ”．

A．How Earthquakes Happen

B．How to Drive a Car

C．What We Should Do in Earthquakes

D．Why Earthquakes Happen

Look at this girl in the picture, she is      good friend.      name is Lily. She is English. She is      . This is me. My       is Li Ling. I’m a Chinese girl. I am one year younger than Lily. We are ____ the same class. Lily likes sports. She      a great sports collection. Look, these are her things. She has 10 tennis rackets, 8 baseballs, 6 basketballs, 12 soccer balls _      18 volleyballs. But she       play sports. She      likes collecting sports things. His brother, David, likes soccer. He plays         every day with his friends.

小题1:A. I                          B. me                  C. my   

小题2:A. She                           B. Her                 C. His

小题3:A. thirteen                       B. thirteenth              C. third

小题4:A. friend                     B. mother              C. name

小题5:A. in                         B. at                  C. on 

小题6:A. is                         B. have                C. has

小题7:A. and                        B. or                  C. but

小题8:A. don’t                     B. isn’t                  C. doesn’t

小题9:A. no                            B. not                 C. only    

小题10:A. volleyball                    B. soccer              C. baseball

当上腔静脉阻塞后上腔静脉系统血液回流进入心脏主要通过的途径有（）

A.胸廓内静脉通路

B.椎静脉通路

C.奇静脉通路

D.胸腹壁静脉通路

E.颈静脉通路

根据《卫生部抗菌药物临床应用管理》要求，关于手术预防用抗菌药物，叙述正确的是（）

A.经口咽部黏膜切口的大手术可使用第1代头孢菌素+甲硝唑

B.骨科手术（包括用螺钉、钢板、金属、关节置换）可使用第3代头孢菌素

C.胆道手术且有反复感染史者可选用头孢曲松或头孢哌酮

D.心脏手术可使用第1、2代头孢菌素

E.神经外科手术可选用万古霉素

秦朝郡县制适应了封建集权政治的需要，最主要是由于（）

A.郡县官吏必须对上一级负责

B.郡县是地方行政管理机构

C.郡县官吏与皇帝是臣与君的关系

D.郡县完全由中央和皇帝控制，官吏不能世袭