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1. 角度

(1)两条异面直线所成角

(2)直线与平面所成角

(3)二面角

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立体几何中的计算

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15.(★★★★★)I hope to buy such a bike as________ by John.

A.rides             B.is ridden           C.ridden            D.are ridden

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14.(★★★★)This kind of books________ popular among the students.

A.is               B.are               C.being             D.have been

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13.(★★★★★)One and a half bananas________ left on the table.

A.are              B.will be            C.being             D.is

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12.(★★★★)Tom said two and three________ five.

A.be                  B.was              C.were             D.is

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11.(★★★★★)A number of sheep________ died of a strange illness.

A.have             B.has              C.has been           D.have been

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10.(★★★★★)Slow and steady________ the race.

A.win              B.wins             C.beats             D.beat

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9.(★★★★)What you said________ quite to the point.

A.am              B.are               C.is                D.were

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8.(★★★★)The rich________ not always happy.

A.are              B.is                C.has              D.have

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