计算某年婴儿死亡率的分母是
A．某年活产总数B．某年未满1周岁婴儿数C．某年平均人口数D．某年中0岁组人口数E．某年末0岁组人口数
参考答案：A
Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her
first ______.[ ]
A. attention
B. purpose
C. attempt
D. desire
产品属性可以分为（）
A.实用型
B.探索型
C.经验型
D.信赖型
