C:c的氢化物沸点比f的氢化物沸点低
A:b、c、e三种元素的原子半径大小关系:e>c>
B:六种元素分别形成的单质晶体中,d的熔、沸点最高
D:b元素除0价外,只有一种化合价
请回答下列问题:
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— That's true. But you'll succeed if you stick with it.
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