第2题: [单项选择]正常人血小板计数一天内的变化率可达() A. 10% B. 12% C. 15% D. 18% E. 20% 参考答案:A 答案解析:正常人血小板数量随时间和生理状态变化,一天之内可以增减6%~10%
第3题: [单项选择]Rarelywe have seen such an effective actor as he has proven himself to be. A. Rarely B. we have seen C. as he D. to be 参考答案:B 答案解析:改为have we seen。rarely等否定副词放于句首时,后面要用部分倒装语序,即主谓倒装。