问题
选择题
将抛物线y=2x2向右平移2个单位所得抛物线的解析式是 [ ]
A.y=2(x+2)2
B.y=2(x-2)2
C.y=2x2+2
D.y=2x2-2
答案
答案:B
将抛物线y=2x2向右平移2个单位所得抛物线的解析式是 [ ]
A.y=2(x+2)2
B.y=2(x-2)2
C.y=2x2+2
D.y=2x2-2
答案:B
补全对话(共5分 每小题1分)
Linda: No. 小题1: Laura: A man named Wang Dawei called the 110 hotline. 小题2: ,his car crashed into (撞上) another one. Linda: Who was trapped (被困) in the car, do you know? Laura: 小题3: They couldn't move out of the car. Linda: 小题4: Laura: Wang Dawei was all right, but his wife hurt her left leg. 小题5: Linda: Thank goodness! He should be careful next time. |