皮皮学，免费搜题
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【单选题】
果实紫黑色的树种是A.
山楂
B.
C.
樱桃
D.
女贞
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】在Flash中,帧频率表示
【单选题】Shaniq has seen two movies this week and two baseball games. Her marginal utility of one more movie is 20 and her marginal utility of one more baseball game is 30. Shaniq will go to a baseball game to...
A.
no matter how much more the baseball game costs compared to the movie.
B.
if the baseball game costs $10.00 and the movie costs $7.00.
C.
if the baseball game costs $10.00 and the movie costs $5.00.
D.
Both answers B and C are correct.
【简答题】More than one (was/were) lost.
【简答题】收银员识别货币真伪时应注意的4点是: 、 、 、 。