皮皮学，免费搜题
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【简答题】
若站点ftp.lyvec.net根目录下有一文件为a.txt,则该文件的URL为 _________________________________ 。
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】According to the law of demand:
A.
the intersection of demand and supply establishes the market equilibrium point.
B.
consumers' tastes can influence the quantity demanded.
C.
there is an inverse relationship between price and the quantity demanded.
D.
"all other things held equal" is an important concept.
E.
there is a direct relationship between price and the quantity demanded.
【简答题】______是猩红热治疗的首选药物。