Which of the following statements is true? ( )
Which of the following statements is true? ( )
A.
Astronauts like to play Jigsaw puzzles in their spare time.
B.
Jigsaw puzzles are commonly used for astronaut training.
C.
The shape and color of jigsaw pieces are attractive to astronauts.
D.
The relationship of an astronaut crew is similar to that of jigsaw pieces.
正确答案是D
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