市场供求双方的交易行为和力量对比首先通过市场成交量变化反映出来。（）
题型：判断题
问题：
市场供求双方的交易行为和力量对比首先通过市场成交量变化反映出来。（）
题型：判断题
| Choose the correct question according to the picture and answer. 根据图片和答语选择相应的问句。 |
| ( )l. — ? —He taught Danny to play ping-pong. A. What is Li Ming doing B. What does Li Ming do C. What did Li Ming do ( ) 2. — ? —He is playing basketball. A. What is Li Ming doing B. What was Li Ming doing C. What did Li Ming do ( )3. — ? —A basketball hit him. A. What is Danny doing B. What happened to Danny C. What was Danny doing |    |