2. 外语
  3. A imaginatively B recently C carefully D unscientifically E accidentally F satisfactorily Schaefer successfully made a field ex

A imaginatively B recently C carefully D unscientifically E accidentally F satisfactorily Schaefer successfully made a field ex

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问题 A imaginatively
B recently
C carefully
D unscientifically
E accidentally
F satisfactorily
Schaefer successfully made a field experiment on rainmaking after planning______
选项
答案C
解析 答案的依据在第七段：After planning carefully，Schaefer made an experiment by dropping dry ice from his plane to the clouds below him．As was expected，snow formed and fell from the bottom of the cloud．Schaefer succeeded。
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