选择题：直接资料与间接资料相比，（ ）

Then the third grade note had opened the attack.A. Then the third grade teacher

图8中水平面总共有（ ）选择一项：A. 2B. 4C. 3 D. 1

All the old carpets need ___(replace)

Emotional or mental problems can ____ from a physical cause. A.rise B.arise

问卷调查法与抽样调查方式配合用于，特别能发挥问卷法的的优点。