第6题: [单项选择]Helen thought Steve might not be content of Stretton because ______. A. he would not be able to write so well in the country B. he would not feel so important in Stretton C. his relationship with Helen was changing D. he would not be lonely without all his London friends 参考答案:D 答案解析:[解析] 由短文最后一句On the other hand, she supposed he might just start... to see his agent or have dinner w
第7题: [单项选择]下列不属于生物矿化机制的是（） A. 成核 B. 晶核的成长 C. 附着 D. 集聚 E. 固相转换 参考答案:C 答案解析:生物矿化是形成硬组织的过程，考生必须要牢记结晶过程，所以答案为C不属于生物矿化机制。
