【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。