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【单选题】
植酸酶的应用是酶制剂发展的重要领域。研究表明,猪禽饲料中添加植酸酶,可以显著提高( )的利用率A.
磷
B.
镁
C.
钙
D.
铜
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皮皮学刷刷变学霸
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【简答题】与高速钢相比,硬质合金有何特点?
【单选题】某企业2008年度自有生产用房原值5 000万元，账面已提折旧1 000万元。已知房产税税率为1.2%，当地政府规定计算房产余值的扣除比例为30%.该企业2008年度应缴纳的房产税税额为（ ）万元。
A.
18
B.
33.6
C.
42
D.
48
【简答题】阅读理解 Some children are talking about what they like doing at school. 1. What does Peter think is cool? A. Listening to music. B. Being good at playing basketball. C. Reading many books. D. Hating musi...
【简答题】My name is Mike. I have a big family. It’s Saturday morning. My grandfather is sitting on the sofa near the window. He is reading the newspaper. My grandmother is taking photos of some flowers in the ...
【多选题】在忽略空气阻力的情况下,让一轻一重的两块石块从同一高度同时自由下落,则关于两块石块的运动情况,下列说法正确的是( ) A .重的石块落得快,先着地 B .轻的石块落得快,先着地 C .在着地前的任一时刻,两块石块具有相同的速度、相同的位移、相同的加速度 D .两块石块在下落段时间内的平均速度相等
A.
？
B.
？？
C.
？？？
D.
？？？？
【简答题】阅读理解。 It's Sunday morning. My family are all at home . My father is sitting near the window. He's reading newspapers. He wants to know what happen all over the world. My mother is watering the flowers...
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