第7题: [单项选择]乳牙患龋高峰年龄段为() A. 2~3岁 B. 3~4岁 C. 5~6岁 D. 7~8岁 E. 9~10岁 参考答案:C 答案解析:考点:乳牙龋病高峰年龄。乳牙萌出后不久即可患龋病,以后患病率逐渐增高:在3岁左右患龋率上升较快,至5~8岁乳牙乳牙患龋率达到高峰;6岁左右恒牙开始萌出,乳牙逐渐脱落,患龋率逐渐下降,所以乳牙患龋率最高
第10题: [单项选择]After his uncle died, the young man ______ the beautiful estate with which he changed from a poor man to a wealthy noble. A. inhabited B. inherited C. inhibited D. inhaled 参考答案:B 答案解析:本题考点为几个形近动词的词义辨析。A项意为“居住”,B项意为“继承”,C项意为“禁止”,D项意为“吸入”。根据题意,选项B为正确答案。