皮皮学，免费搜题
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【单选题】
婴幼儿配方奶粉中含有糖类、脂肪、蛋白质、无机盐和维生素等多种营养物质。关于这些营养物质的叙述,不正确的是( )A.
脂肪是人体内的备用能源物质
B.
蛋白质是建造和修复细胞的重要原料
C.
儿童时期缺钙易患佝偻病
D.
维生素的种类多，作用大，所以需求量也大
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举一反三
【多选题】On the New Year's Day, people in ______ clean their houses.
A.
the Netherlands
B.
Iran
C.
China
【单选题】一只电阻值为 R 的电阻丝,两端电压为 U 时,通过的电流为 I ,若将该电阻两端电压变为 2U ,则电阻的阻值和通过它的电流分别是 ( )
A.
2R ， 2I
B.
R ， I
C.
2R ， I
D.
R ， 2I
【简答题】完形填空。 Jim is the son of a farm owner. One New Year's Day, when he was 15 years old, his father 1 him to work on the farm for one year at his free time. Jim was 2 with his father's idea. 'That isn't my...
【单选题】题 We were overjoyed at the news of China__________ another man-made satel1ite.
A.
starting
B.
1aunching
C.
fighting
D.
shouting
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【多选题】On the New Year's Day, people in ______ clean their houses.
A.
the Netherlands
B.
Iran
C.
China