单项选择题

Magnetic resonance imaging devices can show ______.

A. dependence on illegal drugs
B. targeted points on the body
C. the change in the flow of blood
D. whether a patient can be treated by acupuncture
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单项选择题
Her first Internet project ______.
A. was a simple one about health
B. started when they had computers in the classroom that were connected to the Internet
C. received congratulatory letters from students’ parents
D. was rewarded a phone line by her administrator
单项选择题
The reason some children are backward in speaking is most probably that ______.
A. they are incapable of learning language rapidly
B. they are exposed to too much language of once
C. their mothers respond inadequately to their attempts to speak
D. their mothers are not intelligent enough to help them
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