问题
单项选择题 A1/A2型题
下列属于过敏反应性疾患的是（）
A.牙龈纤维瘤病
B.浆细胞龈炎
C.药物性龈炎
D.边缘性龈炎
E.牙龈 * * 炎
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
下列属于过敏反应性疾患的是（）
A.牙龈纤维瘤病
B.浆细胞龈炎
C.药物性龈炎
D.边缘性龈炎
E.牙龈 * * 炎
参考答案：B
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| Life today is 1 than it was hundreds of years ago, but it has 2 some new problems. One of the biggest problems is pollution. We can see it, smell it, drink it, and 3 hear it. 4 has polluted Earth. The more people, the more .because there were not 5 people. Now man is slowly polluting 6 world. Air pollution is still the most serious among (在……之中) all kinds of pollution. It is bad for all 7 animals. It is caused by heavy traffic. It is said that the situations will be much better if people ride bikes 8 driving cars. When you are riding, there is no pollution. But even in developing countries, most people don't go to work by bike. It is not because bikes are expensive or people are tired if they ride to work, but because the roads for the cars become 9 , more people put away their bikes and go to work by car or by bus, then things are getting 10 . | ||||
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