问题
单项选择题 A1/A2型题
以下哪一项不是乳牙龋蚀的特点（）
A.龋坏率高，发病早
B.龋齿多发、龋蚀范围广
C.龋蚀发展速度快
D.自觉症状明显
E.修复性牙本质形成活跃
答案
参考答案：D
解析：乳牙龋蚀的特点：龋坏率高，发病早；龋齿多发、龋蚀范围广；龋蚀发展速度快；自觉症状不明显；修复性牙本质形成活跃。
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以下哪一项不是乳牙龋蚀的特点（）
A.龋坏率高，发病早
B.龋齿多发、龋蚀范围广
C.龋蚀发展速度快
D.自觉症状明显
E.修复性牙本质形成活跃
参考答案：D
解析：乳牙龋蚀的特点：龋坏率高，发病早；龋齿多发、龋蚀范围广；龋蚀发展速度快；自觉症状不明显；修复性牙本质形成活跃。
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habits. Here is some 2_____ on what to do if you want to be healthy. Early to bed and early to 3_____ makes a man healthy and wise. This is an old English 4_____. Is this true? Perhaps it is. The body must have enough sleep. If you do not go to bed early, you cannot have enough sleep. Then you cannot think or do your work 5_____. Some people go to bed late at night and get up late in the morning. This is not good 6_____ them. We must sleep at night when it is dark. The dark helps us to sleep well. When the 7_____ comes, we must gel up. This is the time for exercise. Exercise keeps the body 8_____. Exercise helps the blood to move around inside the body. Blood 9_____ food to all parts of our bodies. The brains in our heads also need blood. We think with our brains. If we take exercise and keep our bodies healthy, we 10_____ think well. |