We can infer from the fifth paragraph that

试卷相关题目

• 1The turbulence detector can tell the severity of the turbulence by measuring

  A.the speed of the plane.

  B.the speed of the light.

  C.the number of particles in the air.

  D.the changes of the particles’ speed.

  开始考试点击查看答案
• 2In December 1997, a United Airlines flight hit unexpected rough air,

  A.causing a lot of damage to the plane.

  B.throwing its passengers out of the cabin.

  C.resulting in heavy casualties.

  D.forcing the pilot to make an emergency landing.

  开始考试点击查看答案
• 3What does “clear-air turbulence” probably mean、 (Paragraph 1)

  A.A not very rough storm.

  B.Unexpected disturbed air.

  C.A kind of visible storm.

  D.A storm over mountain ridges.

  开始考试点击查看答案
• 4Which of the following statements is NOT true, according to the passage、

  A.One third of the world’s population drinks coffee.

  B.Coffee is native to Colombia.

  C.Coffee can keep one awake.

  D.Coffee drinks were first made by Arabs.

  开始考试点击查看答案
• 5Which country is the largest coffee producer、

  A.Brazil.

  B.Colombia.

  C.Ethiopia.

  D.Egypt.

  开始考试点击查看答案
• 6The last paragraph tells us, among other things, that

  A.the lidar detector needs improvement.

  B.many airlines are interested in the system.

  C.passengers often forget to fasten their seatbelts.

  D.the lidar detector can be used in a wide range of areas.

  开始考试点击查看答案
• 7Which of the following statements about Flowers and Yeo is true、

  A.They are students at Sussex University.

  B.They are rice breeders.

  C.They are husband and wife

  D.They are colleagues at an institution of higher learning.

  开始考试点击查看答案
• 8Flowers and Yeo have started a programme

  A.to find ways to prevent water pollution.

  B.to identify genes that promote growth in salty soil.

  C.to breed rice plants that taste salty.

  D.to find ways to remove excessive salt from soil.

  开始考试点击查看答案
• 9Which of the following is NOT mentioned as a cause of the problem discussed in the passage、

  A.Natural barriers to sea water have been destroyed.

  B.The water table has gone down after droughts.

  C.Sea level has been continuously rising.

  D.Evaporation of water leaves salt behind.

  开始考试点击查看答案
• 10The word “affect” in Paragraph 6 could be best replaced by

  A.“influence”

  B.“effect”

  C.“stop”

  D.“present”

  开始考试点击查看答案