When did the orbiter's problem begin、

试卷相关题目

• 1How long did it take the orbiter to get close to mars、

  A.One year.

  B.Less than one year.

  C.About two and a half year.

  D.More than three years.

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• 2NASA built the mars climate orbiter to get information about __________.

  A.possible life on Mars

  B.the size of Mars

  C.the shape of Mars

  D.the atmosphere of Mars

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• 3We can conclude from this passage that ballet _________.

  A.will continue to change

  B.is a dying art

  C.is currently performed only in Russia

  D.is often performed by dancers with little training

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• 4Who had an important influence on early ballet、

  A.Balanchine

  B.Louis XIV

  C.Antoinette

  D.Diaghilev

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• 5Professional ballet was first performed in _________.

  A.France

  B.Italy

  C.Russia

  D.America

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• 6What caused the orbiter's problem、

  A.Scientists used wrong guidelines of mathematics.

  B.Scientists used wrong building materials.

  C.Scientists used different operating systems.

  D.Scientists used different measurement systems.

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• 7Why didn't NASA scientists identify the problem before the orbiter left for Mars、

  A.They didn't know the English system.

  B.They were sure of the success of the trip.

  C.They didn't get enough research funding.

  D.They were tired from working long hours.

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• 8Whooping cranes migrate in winter to__________.

  A.find warmth and food

  B.raise baby whooping cranes

  C.get human help

  D.lay eggs

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• 9Whooping cranes are native to__________.

  A.Mexico

  B.South America

  C.North America

  D.the Persian Gulf

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• 10Operation Migration aims to__________.

  A.teach adult cranes how to fly

  B.lead young cranes on their first trip south

  C.breed cranes in special parks

  D.transport cranes to the North

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