单项选择题

Blindness first began creeping up on Barbara Campbell when she was a teenager, and by her late 30s, her eye disease had stolen what was left of her sight.
Reliant (依赖于) on a talking computer for reading and a cane for navigating New York City, where she lives and works, Ms. Campbell, now 56, would have been thrilled to see something. Anything.
Now, as part of a striking experiment, she can. So far, she can detect burners on her stove when making a grilled cheese, her mirror flame, and whether her computer monitor is on.

As part of the experiment, Ms. Campbell now are able to all the following EXCEPTA. walking in the city without the cane.
B. seeing her mirror flame.
C. telling whether her computer monitor is on.
D. detecting burners on her stove.
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A health profile is a portrait of all of the factors that influence your health. To draw your health profile, you will need to know what diseases run in your family, what health hazards you may be exposed to at work, how your daily diet compares to the recommended standards, how much time per week you spend exercising and what type of exercise you engage in, how stressful your work and family environments are, what kinds of illnesses you get regularly, and whether or not you have any one of a number of addictions. To complete this portrait, you should have a checkup to determine how your blood, heart, and lungs are functioning. This checkup will seine as a baseline (基础，起点), to which you can then compare later tests.
A physical checkup on one’s blood, heart and lungs serves asA. the basis on which one can evaluate his health status.
B. part of one’s health profile.
C. the starting point of improving one’s health.
D. an example of a health profile.
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A lot changed in between the births of my second and third daughters. For one thing, thistime around I really am getting no sleep; for another, the pediatrician recommended something forour 1 - month - old that is different from what had been suggested for our other children. She said we needed to pick up a liquid multivitamin that contains 400 international units (IUs) of vitamin D. It was a little confusing, because with our first daughter, now almost 4, the doctor told us to simply get her out in the sun from time to time to let her body produce vitamin D. When our second child was born two years ago, we were told to give her a multivitamin that had 200 IUs ofvitamin D. And now another change. So, what gives with vitamin D, and what do we really know about its risks and bene: fits How much vitamin D did the pediatrician recommended for the writer’s third daughter
A. 200 IUs
B. 400 IUs
C. 4 IUs
D. None
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