______ crystal system has three axes （a1, a2 and a3) in the x-y plane 120° apart and a fourth axis （

相似题目

• Alfred Adams has not _______.

  查看最佳答案

• Boris has brains. In fact, I doubt whether anyone in the class has _________IQ.

  查看最佳答案

• He has ________ been to Shanghai , has he ?

  查看最佳答案

• In the system of language, the sound system is_____.

  查看最佳答案

• It has now become _________ to us that a mistake has been made.

  查看最佳答案

• The Dow Jones Index has fallen by __________ to __________, and the FT Index has risen __________ to __________.

  查看最佳答案

• When the value of the dollar changes from £0.5 to £0.75, then the pound has _________ and the dollar has _________.

  查看最佳答案

• He has _______ been to Shanghai , has he ?

  查看最佳答案

• The old system was fairly complicated _________ the new system is really very simple.

  A、 whereby B、whereon C、wherein D、whereas

  查看最佳答案

• According to Crystal (1992:17), language marks our identity, geographically in terms of ____.

  查看最佳答案

• The system has been designed to give students quick and easy _____ to the digital resources of thelibrary.

  查看最佳答案

• Supply chain software can be classified as either supply chain ________ systems or supply chain ________ systems.

  查看最佳答案

• Computer office systems consist of ______.

  A．computers and typewriters B．typewriters and computers C．typewriters and their peripheral equipment D．computers and their peripheral equipment

  查看最佳答案

• Since joining the European Economic Community in ______, Britain has adopted the Community system of agricultural support.

  A．1973 B．1974 C．1975 D．1976

  查看最佳答案

• The bike hire system will______.

  A．be expanded to serve the 2012 Olympic Games B．be provided free for the 2012 Olympic athletes C．benefit from the 2012 Olympic Games． D．be free of charge for the 2012 Olympic visitors

  查看最佳答案

• Mrs. Taylor has ______ 8-year-old daughter who has ______ gift for painting—she has won two national prizes.

  A) a, a B) an, the C) an, a D) the, the

  查看最佳答案

• __________ this multimedia product has some shortcomings, it has also some good points.

  A、While B、If C、Not only

  查看最佳答案

• ______ is formed when the droplets or ice crystals in clouds have become sufficiently large to fall to the groun

  A.Humidity B.Temperature C.Precipitation D.Wind

  查看最佳答案

• In order to help to form. shiny crystals of diamonds the carbon needed______.

  A．to act as a catalyst B．to be in different forms C．to have a pressure chamber D．to be dissolved in a melted metal

  查看最佳答案

• Keiko has_____.

  A．enjoyed being with other sea animals B．killed other sea animals that have come into his pen C．had limited contact with other sea animals D．is ready to go to the open sea

  查看最佳答案

• The synthetic crystal of diamond______.

  A．could not even cut glass B．was made at the temperature of 900℉ C．gave off carbon dioxide when it was under X-rays D．is not like the real diamond in atomic structure

  查看最佳答案

• Attempts to ______this old system have been made in every presidentialelection in the past one hundred years, but the system has survived all assaults.

  A、break down B、break in C、break up D、break through

  查看最佳答案

• If the system does not exchange energy with surroundings, it is an _________ A open system B closed system C isolated system D control volume

  A．opensystem B．closedsystem C．isolatedsystem D．controlvolume

  查看最佳答案

• Rob has some______.

  A．leaf B．leave C．leafs D．leaves

  查看最佳答案