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【简答题】
年产量最高的金属．铁的主要合金有生铁和钢，它们的主要区别是含碳量不同，其生铁的含碳量为______．钢铁锈蚀的条件是______．
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【简答题】Complete the sentences with much or many. 1 There aren't _________ rice dishes on the menu 2 How _______ tables do we need to reserve for the staff party? 3 That's not a very exciting menu. There isn'...
【简答题】声明语句是一种非操作的语句,在编译时负责分配 。
【多选题】长为6m,宽为2.2m的现浇钢筋混凝土楼板,施工缝可以留设在( )
A.
距离长边一侧1.0m且平行于长边的位置
B.
距离长边一侧0.5m且平行于长边的位置
C.
距离短边一侧1.0m且平行于短边的位置
D.
距离短边一侧2.0m且平行于短边的位置
【单选题】Food, water, shelter: the three essentials for survival on Earth. But there's a fourth we don't think about much, because it's freely available: _______.
A.
aluminum
B.
carbon
C.
helium
D.
oxygen
【简答题】U3_Show Time.mp4 Mrs. Sanchez: You should have real food for breakfast: (1) ______, milk, fruit. Please, let me make something for you. Hector: How about some cake? Cake has eggs and (2) ______ and fr...
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