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问题 口算题
先算出每列第一题的积，然后直接写出下面两题的积。
46×2=  180×3=160×5=
46×20=18×30=160×15= 
46×200=180×300=320×5=
                            
答案

92；920；9200；540；540；54000；800；2400；1600

补全对话，情景问答
补全对话，根据对话内容，从方框内选择合适的句子补全对话。（有两项多余）
A. But we are old enough.
B. I think your mother is right.
C. Wow, how kind your father is!
D. What rules do you have at home?
E. Well, sometimes our parents don't understand us.
F. My father doesn't allow me to go out on weekends.
G. My parents don't allow me to make friends with any boys, either.
A: Hi, Wang Li! You look unhappy. What's wrong?
B: (1)             　　　　　
A: I don't think that's a good idea. We need to spend time with friends.
B: That's right. (2)             　　　　　
A: Really? But my father asks me to make friends with all of my classmates.
B: (3)             　　　　　
A: But my mother doesn't let me play computer games for long.
B: (4)              We mustn't spend too much time playing computer games.
A: (5)             　　　　　
B: You are right. I think we need to talk to our parents and make them understand us.
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单项选择题

哥伦布很有些幸运，他以一个错误“真理”做信念，却成就了伟大的航海家的美名，甚至他至死都坚持他到达的是印度这一明显荒谬的想法，亦丝毫无损于他的光辉。而他所相信的“真理”正是托勒密的“小地球”理论。相比于埃拉托色尼所计算出的“不可思议”的大地球，古人更愿意相信前者。或许，这种“想当然”给予了哥伦布穿越大洋的勇气，“无知者无畏”在他这里得到了很好的证明。这段文字的主旨是( )。

A．哥伦布相信托勒密的错误“真理”，从而穿越了大洋，这是一个关于“无知者无畏”的例证

B．托勒密的“小地球”理论为古人所接受，是哥伦布航海的动力所在，并成就了伟大的航海家的美名

C．埃拉托色尼所计算出的大地球与托勒密的“小地球”相比，古人包括哥伦布更愿意相信后者

D．哥伦布坚信他将要到达的是印度，这一错误信念使他能有足够的勇气穿越大洋，这正是“无知者无畏”的表现
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