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问题 单项选择题

额窦、蝶窦、筛窦的最佳摄影位置分别是

A．许氏位、瓦氏位、鼻窦侧位
B．鼻窦侧位、梅氏位、瓦氏位
C．瓦氏位、鼻窦侧位、梅氏位
D．瓦氏位、斯氏位、柯氏位
E．柯氏位、鼻窦侧位、瓦氏位

答案

参考答案：E

阅读理解

Do you know the book called Cat Found? It’s written by Ingrid Lee. The book is about helping cats. Billy is a boy and he lives in a small town. There’re a lot of stray(流浪的) cats in it. People don’t like them and some naughty(淘气的) boys even throw rocks(石头) at them. One day Billy finds a little cat on the street. It is badly hurt. He is a kind boy and decides to take it home. His father doesn’t like the cat very much, so he puts it in his bedroom. He looks after the cat very well and it becomes healthy soon. Billy and his friends want to do something to tell people to help cats in many ways. Can they succeed(成功)?

根据短文内容判断正(T)误(F)。

小题1:You can find your lost cat at Cat Found. (  )

小题2:Billy wants to do something to tell people to help cats. (  )

小题3:Billy and his friends are very naughty. (  )

小题4:Billy’s father likes cats very much. (  )

小题5:There’re many stray cats in Billy’s hometown(家乡). (  )

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单项选择题

釉质的无机盐主要存在形式是（）

A.Ca（OH）2

B.NaCl

C.Ca10（PO4）6（OH）2

D.Mg3（PO4）2

E.Na2CO3
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