【T19】
A. BETWEEN
B. IMITATE
C. ACCELERATE
D. OTHERWISE PHRASES: A. ENABLING THE BIRD TO【T13】______
B. IT【T14】______ COULD
C. WOULD BE DIFFICULT TO【T15】______
D. FROM【T16】______ ITS FEATHERS THE EMPEROR PENGUIN TRAPS AIR IN ITS FEATHERS. NOT ONLY DOES THIS INSULATE THE BIRD AGAINST EXTREME COLD BUT IT ALSO ENABLES IT TO MOVE TWO OR THREE TIMES FASTER THAN【T17】______ HOW? MARINE BIOLOGISTS HAVE SUGGESTED THAT IT DOES SO BY RELEASING TINY AIR BUBBLES【T18】______ . AS THESE BUBBLES ARE RELEASED, THEY REDUCE FRICTION ON THE SURFACE OF THE PENGUIN'S WINGS,【T19】______ . INTERESTINGLY, ENGINEERS HAVE BEEN STUDYING WAYS TO MAKE SHIPS GO FASTER BY USING BUBBLES TO REDUCE FRICTION AGAINST THEIR HULLS(船身). HOWEVER, RESEARCHERS ACKNOWLEDGE THAT FURTHER INVESTIGATION IS CHALLENGING BECAUSE 'THE COMPLEXITY OF PENGUIN'S WINGS【T20】______ '.

未分类题Comment 1 suggests that______.A．parents may influence children's thinkingB．persistent parental involvement is a mustC．parents should leave their children aloneD．kids should be kids after all

未分类题Which of the following is NOT one of the health benefits of carbohydrates?A．Prevention of cancer.B．Prevention of stroke.C．Prevention of heart disease.D．Prevention of fiber reduction.

未分类题【C5】A．make forB．take upC．workoutD．lead to

未分类题Security guards dispersed the crowd that had gathered around the Capitol.A．arrestedB．stoppedC．scatteredD．watched

未分类题【T1】A.PITCH IN B.AGENDA C.RECYCLED A.A GREATER DEMAND FOR THE【T1】______MATERIALS B.SEEMS TO BE ON THE【T2】______ C.FEELS MOVED TO【T3】______AND HELP WE HEAR IT A LOT IN THE NEWS THESE DAYS: 'RECYCLE NEWSPAPERS AND SAVE A TREE. COLLECT BOTTLES AND CANS SO THEY CAN BE REUSED IN THE MANUFACTURING OF NEW PRODUCTS. PROTECTING OUR DELICATE ENVIRONMENT【T4】______OF POLITICIANS, GOVERNMENT LEADERS, AND CITIZENSIN MANY PARTS OF THE WORLD TO SHOW SUPPORT FOR MOTHER NATURE. THE CONCEPT OF GREEN CONSUMERISM HASGAINED MOMENTUM MORE AND MORE OVER THE LAST DECADE, AND THE PUBLIC【T5】______HOWEVER, THREE ESSENTIAL KEYS NEEDED POWER THIS MOVEMENT INCLUDE A MORE INFORMED PUBLIC,THE DEVELOPMENT OF IMPROVED TECHNOLOGY, AND【T6】______.此题为多项选择题。

未分类题【T14】A.ALL OF THAT B.AS IF IT WERE C.FRESH WATER SUPPLY D.IN THIS FIELD A.A LIMITED【T13】______ B.SO THAT IT CAN BE USED AGAIN JUST【T14】______FROM A SPRING C.AND WE CANNOT EVEN USE【T15】______ D.EXPERIMENTS HAVE ALREADY BEEN DONE【T16】______ THE WORLD IS NOT ONLY HUNGRY, IT IS ALSO THIRSTY FOR WATER. IT SEEMS THERE IS PLENTY OF WATER, BUT ABOUT 97% OF THIS HUGE AMOUNT IS SEA-WATER, OR SALT WATER. MAN CAN ONLY DRINK AND USE THE OTHER 3% FRESH WATER.【T17】______, BECAUSE SOME OF IT IS IN THE FORM. OF ICEBERGS AND GLACIERS. EVEN WORSE, SOME OF IT HAS BEEN POLLUTED. AT THE MOMENT, HIS SMALL AMOUNT OF FRESH WATER IS STILL ENOUGH FOR US. HOWEVER, OUR NEED FOR WATER IS INCREASING RAPIDLY. ONLY IF WE TAKE STEPS TO DEAL WITH THIS PROBLEM NOW, CAN WE AVOID A SEVERE WORLDWIDE WATER SHORTAGE LATER ON. ONE OF THE USEFUL STEPS WE CAN TAKE IS TO STOP UNLIMITED USE OF WATER.【T18】______, HOWEVER, WOULD HAVE A BAD EFFECT ON AGRICULTURE AND INDUSTRY. IN ADDITION TO STOPPING WASTING OUR PRECIOUS WATER, ONE MORE USEFUL STEP WE SHOULD TAKE IS TO DEVELOP WAYS OF REUSING IT.【T19】______, BUT ONLY ON A SMALL SCALE. TODAY, IN MOST LARGE CITIES, WATER IS USED ONLY ONCE AND IT EVENTUALLY RETURNS TO THE SEA OR RUNS INTO UNDERGROUND STORAGE TANKS. BUT IT IS POSSIBLE TO PIPE WATER THAT HAS BEEN USED TO A PURIFYING PLANT. THERE IT CAN BE FILTERED AND TREATED WITH CHEMICALS【T20】______.

未分类题【T19】A.ALL OF THAT B.AS IF IT WERE C.FRESH WATER SUPPLY D.IN THIS FIELD A.A LIMITED【T13】______ B.SO THAT IT CAN BE USED AGAIN JUST【T14】______FROM A SPRING C.AND WE CANNOT EVEN USE【T15】______ D.EXPERIMENTS HAVE ALREADY BEEN DONE【T16】______ THE WORLD IS NOT ONLY HUNGRY, IT IS ALSO THIRSTY FOR WATER. IT SEEMS THERE IS PLENTY OF WATER, BUT ABOUT 97% OF THIS HUGE AMOUNT IS SEA-WATER, OR SALT WATER. MAN CAN ONLY DRINK AND USE THE OTHER 3% FRESH WATER.【T17】______, BECAUSE SOME OF IT IS IN THE FORM. OF ICEBERGS AND GLACIERS. EVEN WORSE, SOME OF IT HAS BEEN POLLUTED. AT THE MOMENT, HIS SMALL AMOUNT OF FRESH WATER IS STILL ENOUGH FOR US. HOWEVER, OUR NEED FOR WATER IS INCREASING RAPIDLY. ONLY IF WE TAKE STEPS TO DEAL WITH THIS PROBLEM NOW, CAN WE AVOID A SEVERE WORLDWIDE WATER SHORTAGE LATER ON. ONE OF THE USEFUL STEPS WE CAN TAKE IS TO STOP UNLIMITED USE OF WATER.【T18】______, HOWEVER, WOULD HAVE A BAD EFFECT ON AGRICULTURE AND INDUSTRY. IN ADDITION TO STOPPING WASTING OUR PRECIOUS WATER, ONE MORE USEFUL STEP WE SHOULD TAKE IS TO DEVELOP WAYS OF REUSING IT.【T19】______, BUT ONLY ON A SMALL SCALE. TODAY, IN MOST LARGE CITIES, WATER IS USED ONLY ONCE AND IT EVENTUALLY RETURNS TO THE SEA OR RUNS INTO UNDERGROUND STORAGE TANKS. BUT IT IS POSSIBLE TO PIPE WATER THAT HAS BEEN USED TO A PURIFYING PLANT. THERE IT CAN BE FILTERED AND TREATED WITH CHEMICALS【T20】______.

未分类题I wondered if she could have the opportunity to spend______here so that she could learn more about the city.A．sometimesB．some timeC．sometimeD．some times

未分类题Some Chinese companies have introduced flexible working time with less emphasis on pressure______.A．than more on efficiencyB．than efficiencyC．and more on efficiencyD．and more than efficiency

未分类题When filled with a gas______ lighter than air, a balloon becomes buoyant and rises.A．muchB．moreC．lessD．little

未分类题Since his paper contains______ mistakes than ours, his will be entered in the contest.A．lessB．the lessC．fewerD．the fewer

未分类题George appears______a hard time convincing his employer that he is right over it.A．havingB．to be havingC．to haveD．having had

未分类题It is reported that by the end of next month the output of personal computers in the factory______by 10%.A．will be risingB．will have risenC．has risenD．has been rising

未分类题______the beginning of the nineteenth century that the creation of more universities was seen to be either necessary or desirable.A．It was untilB．It was not untilC．Not it wasD．It was from

未分类题In recent years there has been a very rapid increase in the numbers of young people, especially girls, ______higher education.A．seekB．seekingC．soughtD．to seek