问题
选择题
Look! Li Lei and Ling Feng ______kites over there.[ ]
A. is flying
B. are flying
C. fly
D. flew
答案
答案：B
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Look! Li Lei and Ling Feng ______kites over there.[ ]
A. is flying
B. are flying
C. fly
D. flew
答案：B
为纵轴、以h为横轴作出的图象应是下图中的______________。