职称英语等级考试模拟题理工类ＡＢ级(9)
文章出处： 发布时间：2006-07-09
第6部分：完型填空 （建议在１５钟以内完成）
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，并涂在答题卡相应的位置上。
Making the Leap
Jumps play a big role in many styles of dancing．Generally, what makes a jump impressive is its hang time, the amount of time a dancer spends in the air．
The quest for greater hang time is a battle against gravity，the constant____1____pull of Earth，said Laws．To leave the ground at all。a dancer has to use leg muscles to create an upward push that is greater than Earth’s downward pull．But the final____2____of any jump depends on just one thing；the upward speed of the body just as the dancer leaves the ground．
Strengthening muscles so they can push harder is one obvious____3____to achieve higher jumps and increase hang time．But ballet dancers also use a simple trick to gain the illusion of staying in the air longer without actually doing so．
In a huge sideways jump called a grand jete, a____4____ballet dancer seems to float for an impossible length of time．Of course，a dancer can’t really hang in the air．The laws of physics decree that during any jump，a dancer’s center of gravity must follow a parabola．A parabola is the same____5____path a ball takes when you throw it into the air．So how do dancers make it look like they’re hanging in the air?
A dancer____6____the illusion of floating in the air by Lifting her legs and arms as she approaches the peak of the jump．The____7____of her body—her torso and her head—respond by sinking a bit．If her timing is just right，she’ll seem to float sideways，instead of rising and falling．The effect is not only beautiful；it____8____makes the jump seem bigger by“stretching out”the peak．
Of course，what goes up must come down．During a typical grand jete，a dancer’s center of gravity rises 2 feet____9____the ground．Pulled by gravity from such a height，the dancer’s body falls very fast—roughly 3.4 meters per second—by the time it reaches the floor．
As it falls，the body carries with it momentum．Momentum is the weight of the body multiplied by its____10____．The bigger the body is and the faster it falls，the greater its momentum．
The only way a dancer can stop dropping through the air is by stopping the body’s momentum，which requires an____11____force from the ground．Landing can be very jarring to a dancer and can____12____injuries．The dancer call ease the landing by bending her knees and letting her aims fall, but she also gets help from an unexpected source：the floor．Wooden dance floors are designed to act____13____shock absorbers．They are springy and can recoil as much as an inch under extreme pressure．That little bit of give makes a big____14____．Landing on a springy floor, the dancer undergoes a slower change in momentum than she would hitting a rigid floor．The give in the floor allows the decrease in momentum to happen more____15____一with less force and less chance of injury．
词汇 ：
jete／n．(芭蕾舞中的)小跳
jarring／adj．(产生)反弹力的
decree／v．规定
springy／adj．有弹性的
parabola／n．抛物线
recoil／v．后缩
torso／n．躯干
give／n．弹性，可弯性
momentum／n．动量
练习：
1．A)parallelly B)upward C)sideways D)downward
2．A)center B)height C)weight D)bredth
3．A)street B)road C)way D)path
4．A)skillful B)beautiful C)careful D)meaningful
5．A)smooth B)short C)curved D)straight
6．A)changes B)uses C)inspects D)creates
7．A)force B)movement C)pull D) rest
8．A)too B)also C)yet D) SO
9．A)off B)out of C)along D)onto
10．A)temperature B)speed C)moisture D)time
11．A)rising B)falling C)opposing D)responding
12．A)increase B)cure C)remove D)cause
13．A)like B)love C)protect D)Cancel
l 4．A)sameness B)resemblance C)difference D)nearness
15．A)gradually B)strongly C)spontaneously D)incidentally
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