According to the text, supersizing is popular among consumers because______.
A. they enjoy eating more
B. there is less packaging
C. it allows the fast food restaurant to make more profits
D. the added amount seems like a bargain
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早期岩浆矿床矿体的产状必与岩浆岩的岩相带相一致。()
干酪根是可存在于沉积岩中可溶于有机溶剂的有机质。()
风化矿床中,Fe、Ti、Al趋于在风化壳中、上部富集成矿。()