【题目】下列常见的物质中,不代表同一种物质的是( )。
A.氯化钠、盐 B.氢氧化钠、苛性钠
C.碳酸钠、纯碱 D.碳酸氢钠、小苏打
科目:初中地理 来源: 题型:
【题目】下列关于空气成分的叙述正确的是( )。
A.空气中氮气和氧气的体积比约为4∶1
B.空气的成分按质量计算,氮气占78%,氧气占21%
C.从液态空气中能分离出氮气,不能分离出氧气和稀有气体
D.空气中含量最多且性质又不活泼的是稀有气体
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【题目】下列关于溶液的说法正确的是( )。
A.溶液一定是无色、透明的混合物
B.溶液加水稀释前后,溶质的质量一定不变
C.溶剂量不变时,加入的溶质越多,溶液质量一定越大
D.物质溶于水形成溶液时,溶液温度一定不变
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科目:初中地理 来源: 题型:
【题目】D
Jack likes eggs, bananas and apples. So every day, he has two eggs, one apple, a cup of milk and some bread for breakfast. For lunch, he has bananas, some chicken and vegetables. And for dinner, he has tomatoes, French fries and ice cream.
His sister likes dessert, oranges and apples. But she often has some hamburgers, one apple and bread for her breakfast. She likes tomatoes, salad and some fish for lunch. For dinner, she likes strawberries and some chicken.
【1】 What does Jack have for breakfast?
A. Some hamburgers, one apple and bread.
B. Bananas, one egg and a cup of milk.
C. Two eggs, one apple and a cup of milk.
D. One apple, two eggs, some bread and a cup of milk.
【2】_________ likes dessert, oranges and apples.
A. Jack B. Jack’s mother
C. Jack’s father D. Jack’s sister
【3】Jack has _________ for his dinner.
A. tomatoes B. French fries and ice cream
C. bananas and some chicken D. both A and B
【4】Jack has some chicken _________, but his sister has some chicken _________.
A. for breakfast; for dinner B. for lunch; for dinner
C. for dinner; for lunch D. for dinner; for dinner
【5】Which of the following is right?
A. Jack likes dessert, but he doesn’t like apples.
B. Jack likes apples, and his sister likes them, too.
C. Jack has two eggs for breakfast, but his sister has one egg.
D. Jack has bananas for lunch, and his sister has apples for lunch.
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【题目】 —You look very cool today, Simon.
—__________
A. Really? Thank you. B. Oh, I don’t think so.
C. No, I’m not cool at all. D. The same to you.
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科目:初中地理 来源: 题型:
【题目】铁生锈的条件是_____________并存,铁锈的主要成分是_________,铁锈是一种混合物,铁生就后变得疏松多孔,因而不能阻止铁继续被锈蚀,破坏铁生锈的条件就能防止铁生锈。
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科目:初中地理 来源: 题型:
【题目】下列有关金属材料的叙述错误的是( )
A.回收利用废旧电池中的铅、汞等可减少对环境的污染
B.铝块能制成铝箔是利用了铝的延展性
C.铝比钢铁中的铁活泼,因而铝的抗腐蚀性能比铁差
D.在铁制品表面刷漆或镀耐腐蚀金属都可以防止铁制品锈蚀
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科目:初中地理 来源: 题型:
【题目】下列有关洗涤的说法中错误的是( )
A.用汽油溶解衣物上的油渍
B.用洗洁精乳化餐具上的油污
C.用食醋洗去热水瓶中的水垢
D.用热的纯碱溶液洗去菜刀上的铁锈
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