问题 多项选择题

化脓性骨髓炎死骨形成后,其结果可为()

A.吞噬细胞清除

B.小死骨可被吸收或由窦道排出

C.长期留于骨腔内,致使感染不能痊愈

D.经过爬行替代作用而被新骨形成所替代

E.通过血管再生,又重新复活

答案

参考答案:A, B, C, D

单项选择题 A1型题
阅读理解

Perfect Disaster

All around us buildings shook. We decided to leave the town. We stopped once we had left the buildings behind us. The carts were moving in opposite directions, though the ground was perfectly flat, and they wouldn't stay in place even with their wheels blocked by stones.

In addition, it seemed as though the sea was being sucked(吸) backwards, as if it were being pushed back by the shaking of the land. Certainly the shoreline moved outwards, and many sea animals were left on dry sand.

Behind us were frightening dark clouds that opened up to show fire—like lightning, but bigger. Not long after that the clouds reached down to the ground and covered the sea. Now came the dust, though still thin. I looked back. A dense cloud appeared behind us, following us like a flood pouring across the land. Then a darkness came that was not like a moonless or cloudy night, but more like being in a closed and unlighted room. You could hear women and children crying, men shouting. Some were calling for parents, others for children; they could only recognize them by their voices.

Darkness and ashes came again, a great weight of them. We stood up and shook the ash off again and again; otherwise we would have been covered with it and crushed by the weight.

At last the cloud became thinner and thinner until it was no more than smoke or fog. Soon there was real daylight. The sight that met our still terrified eyes was a changed world, buried in ash like snow.

―from Pliny's letter to a friend

小题1:Pliny left the town after _____.  

A.the eruption

B.the sky became dark

C.the buildings began shaking

D.the sea went back小题2:The carts wouldn't stay still because _____.

A.the earth was shaking

B.the sea sucked them backwards

C.the wheels had stones under them

D.the lightening frightened the horses小题3:The reason why it was dark is that _____.

A.it was very late at night

B.clouds of ash covered the sun

C.there was a very bad storm

D.there was no moon that night小题4:People tried to find their relations by calling out their names and      .

A.listening to their voices

B.running about looking for them

C.shaking the ash off people

D.watching people as they ran past