【题目】将下列四种物质白醋、食用油、食盐、酒精分别放入水中，能形成乳浊液的是（ ）
A.白醋 B.食用油 C.食盐 D.酒精
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【题目】关于金属在自然界中存在形式的说法中正确的是（双选）（ ）
A．金、银可在自然界中以单质形式存在，是因为它们的活动性很弱
B．在自然界中很难找到以单质形式存在的金属，是因为金属资源太少
C．在自然界中存在最多的单质是铁
D．金属矿物广泛存在于地壳和海洋中
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【题目】D
Simon is a student in a middle school. He is very strong. He goes to No.6 Middle School on a bus. He’s good at English. But he’s often late for his English classes. His father is a doctor. He’s big and tall. He works in a big hospital. His mother is a nurse. She’s slim and pretty. They are in the same hospital. They all work hard. He loves his father and mother very much. His father and mother both go to work by bike. We can see bikes here and there. And China is a ＂country of bikes＂.
【1】What is Simon?
A. He is very strong. B. He is a student.
C. He is a son. D. He is a doctor.
【2】How does Simon go to school?
A. By bike.
B. His father takes him to school every day.
C. On foot.
D. By bus.
【3】 What does Simon’s father look like?
A. He’s big. B. He works in a big hospital.
C. He’s tall. D. A and C.
【4】 Why do we say China is a ＂country of bikes＂?
A. Because we all go to school by bike.
B. Because everyone in China likes bikes.
C. Because bikes can make us strong.
D. Because there are many bikes in China, we can see bikes here and there.
【5】Where does Simon’s parents work?
A. They work in the same hospital.
B. His father works in a big hospital, but his mother doesn’t.
C. His mother works in a big hospital, but his father doesn’t.
D. They both go to span>work by bike.
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【题目】下列有关溶液的说法中，正确的是（ ）
A．溶液都是无色透明的
B．溶液中的溶剂一定是水
C．均一、稳定的液体都是溶液
D．溶液都是由溶质和溶剂组成的
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【题目】将饱和石灰水变为不饱和石灰水，可采用三种方法：①______________；②______________________；③________________________________.
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