问题 单项选择题 共用题干题

患者,男,30岁,1个月来右侧上后牙食物嵌塞,嵌塞后引起疼痛不能继续进食,要求治疗。查;右上颌第一磨牙深龋,去腐质后未探及穿髓孔,叩(-),冷测同对照牙,探远中龈 * * 出血

其治疗应选用()

A.磨除法

B.再矿化法

C.药物治疗

D.垫底后充填

E.安抚后充填

答案

参考答案:D

阅读理解

     Their round bodies, round flat noses and large ears often remind us of bears every time we see koalas. Probably that's why these animals are often referred to as koala bears. Koalas are natives of Australia.

However, they aren't found all over the continent. The habitat of koala bears  is eastern regions of

Australia and South Australia.    

     Koalas are found where there are enough forests of eucalyptus(桉树) trees. The association of koalas and eucalyptus trees is due to the fact that these animals feed on the leaves of eucalyptus trees. But that's

not all. In addition, the trees also serve as the homes of the koalas.    

     Koalas grow around 27 to 36 inches tall and weigh 5 to 9 kilograms on average. Male kaolas are

larger than the females. Life can stretch up to 17 years.     

     Like many other animals, the habitat of koala bears is fast decreasing due to deforestation and quick

urbanization(都市化). However, efforts by some scientists and animal lovers have successfully introduced these creatures back in certain parts of Australia.

1. What do Koalas look like ?   (回答词数不超过3个)

                                                                                       

2. Where is the main habitat of koala bears in the world?  (回答词数不超过8个)

                                                                                                 

3. What do eucalyptus trees provide koalas with ?  (回答词数不超过3个)

                                                                                      

单项选择题