互感系数的大小值与（）因素无关。
A.两个线圈的匝数
B.两线圈的相对位置
C.两线圈的绕向
D.两线圈的周围介质
参考答案：C
血小板在止血过程中的作用，下列哪项是错误的 （）
A.黏附功能
B.释放反应
C.活化Ⅻ因子，启动内源凝血途径
D.聚集功能
E.促凝作用
A. It is not enough to learn a foreign language for three years. B. It requires time and effort to master a foreign language. C. A child can learn a foreign language better if her mother is around. D. A child can learn a foreign language faster than an adult.
