读如图，完成下列各题．
给小儿服用小儿麻痹疫苗糖丸，其接种的疫苗和产生的免疫分别属于（ ）
按照下面的规律穿珠子，第29颗珠子是白色还是黑色?
——Hello, this is Jack. Mary I speak to Tom?——Sorry, he isn't in at the moment. If he back, I'II ask him to call you back.
