皮皮学，免费搜题
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【单选题】
碳水化合物、脂类、蛋白质属于：A.
产能营养素
B.
非产能营养素
C.
微量营养素
D.
必需营养素
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举一反三
【单选题】Look at the picture. Can you see some boys ______ basketball? [ ]
A.
plays
B.
play
C.
played
D.
playing
【简答题】Some agers never even read a newspaper, ______ a book; they spend muchtime playing online s though. A) let out B) let alone C) let go of D) hold fast
【单选题】The missing boys were last seen ______ near the river. [ ]
A.
playing
B.
to play
C.
play
D.
to be playing
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