题目内容
（请给出正确答案）
[主观题]
Which of the following statements is INCORRECT？A．The planet must be as big and heavy as th
Which of the following statements is INCORRECT？
A．The planet must be as big and heavy as the earth.
B．Proper conditions are essential to the existence of life.
C．Double stars can provide steady light and heat.
D．The distance between a planet and its sun should be right.
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