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【判断题】

正洗时有树脂流出,说明底部排水装置损坏(如排水帽破裂或石英砂级配垫层乱层),应及时检修。()

A.
正确
B.
错误
举报
参考答案:
参考解析:
.
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举一反三

【单选题】When stars like our Sun die, they bloat to become red giants and then eject gigantic clouds of gas and dust into space. Increasingly, however, scientists found themselves at a profound loss to explain...

A.
explain-the possible way of death of our Sun.
B.
show the two types of red giants.
C.
discuss on the way of red giants to become white dwarfs.
D.
explore the origin of life.