职称英语职称英语理工类2009年职称英语等级考试试题理工类B

试卷预览

• 21The C-14 in an organism begins to decay when it dies

  A.Right

  B.Wrong

  C.Not mentioned

  开始考试练习点击查看答案
• 22The half-life of C-14 is about 25，000 years.

  A.Right

  B.Wrong

  C.Not mentioned

  开始考试练习点击查看答案
• 23Liquid water only exists

  A.in the center of the earth.

  B.on the surface of our planet.

  C.in a very narrow range of temperatures.

  D.in the coastal areas of the earth.

  开始考试练习点击查看答案
• 24The total quantity of water on Earth

  A.remains almost unchanged.

  B.has greatly increased in recent years.

  C.is decreasing constantly.

  D.is affected by global warming.

  开始考试练习点击查看答案
• 25Most of the fresh water on Earth

  A.is stored underground.

  B.is in the form of ice at the Poles and on mountains.

  C.is found in rivers and lakes.

  D.comes from the rain.

  开始考试练习点击查看答案
• 26The word “fraction” in the second paragraph means

  A.a very small amount.

  B.a large area.

  C.an important system.

  D.a major source of information

  开始考试练习点击查看答案
• 27There is more of rainfall

  A.over the mountains than over the rivers.

  B.over the rivers than over the mountains

  C.over the oceans than over the lan

  D.D.over the land than over the oceans.

  开始考试练习点击查看答案
• 28What is responsible for processing the information sent by your eyes？

  A.The magnetic system in the brain.

  B.The central part of the heart.

  C.Oxygen-rich bloo

  D.D.Neurons in the brain.

  开始考试练习点击查看答案
• 29The function of an fMRI machine is

  A.to show how neutrons take in oxygen-rich blood.

  B.to measure how dense the blood is in the brain.

  C.to record how much oxygen the brain consumes.

  D.to identify which parts of the brain are processing information

  开始考试练习点击查看答案
• 30The expression “highlighting the areas of the brain at work' in paragraph 5 means

  A.giving light to the parts of the brain that are processing information.

  B.marking the parts of the brain that are processing information.

  C.putting the parts of the brain to work.

  D.preventing the parts of the brain from working.

  开始考试练习点击查看答案