问题 单项选择题 A1/A2型题

颌骨缺损的修复治疗中关于磁性固位技术,下列说法中不正确的是()

A.是利用磁体与磁性材料之间的磁引力发展成的一种固位技术

B.通常是由一只闭合磁路的永磁体和一只由耐蚀软磁合金制作的衔铁组成的磁性附着体

C.固位可靠,操作简单,可自动复位,无须调节修理

D.传递较大的侧向力

E.已成为改善颌面赝复体固位的重要手段

答案

参考答案:D

阅读理解

阅读理解。

     With big handbags becoming a key fashion accessory (配饰) for working women, health experts are

warning they can also become a key health concern. 

     Bags for women have become bigger and heavier as designers combine briefcases with handbags and

straps have become longer, resulting in many users complaining of neck, shoulder and back problems. 

     "I see so many women with neck pains and headaches and what I usually do is look for their purse and

pick it up," said Jane Sadler, a family practice physician at Baylor Medical Center in Garland, Texas. "We

take it over to the scale and weigh it and usually they're anywhere from 7 to 10 pounds. We're really going

to see women with more and more problems later on if we continue the big purse craze." 

     William Case, a physical therapist (临床医生) in private practice in Houston, Texas, urged designers "to

place a cute, educational caution tag (标签) on all bags to inform buyers of potential neck and shoulder

dangers." Above all, he suggested correct posture while carrying big purses, keeping the head and shoulders

upright. Patients should also often change the size and weight of purses carried. 

     "The extra-large purses are quite extraordinary. They look beautiful when the women wear them, but I

don't know how aware they are of the potential problems," Case said.

     Placing objects on one shoulder was one of the least efficient (高效率的) ways of carrying a load,

according to a professor from Cornell University in New York State. "This causes a great imbalance," he said.

"If a big bag is a fashion accessory, then occasional and symbolic use is fine. If not, then keep it light."

1. Jane Salder would"look for their purse and pick it up"in order to see whether the purses _____. [ ]

A. contained enough

B. were worth a lot of pounds

C. were too heavy

D. were too large

2. Which correctly explains the meaning of the underlined word"posture"in the 4th paragraph? [ ]

A. The way you position your body.

B. The part of your body where you place a weight.

C. The strength you use to carry a weight.

D. The height of the weight you carry.

3. None of the experts advised big bag users to _____.[ ]

A. be aware of the big-bag problems

B. wear big bags in the right way

C. avoid using big bags very often

D. give up the fashion to keep fit

单项选择题