健康检查根据检查目的与对象的不同，分为预防性检查、定期检查、集体检查、个人检查四种形式。（）
参考答案：对
“上北下南，左西右东”的看地图方法，适用于（ ）
A．所有地图
B．不带经纬网和指向标的地图
C．带有指向标的地图
D．所有经纬网的地图
After school I found Mother was in bed sick. ____ Mother was ill, I should do something for her.[ ]
A. So
B. Though
C. Since
D. If
l I found Mother was in bed sick. ____ Mother was ill, I should do something for her.[ ]