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单项选择题
下列哪项可出现后方回声增强
A、实质性肿瘤
B、结石
C、钙化
D、囊性肿瘤
E、以上都不是
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--I was born in Boston,but I studied in New York.()?--I was born in New York,but studied in Boston.A、What do you doB、And youC、Where were youD、Do you
单项选择题
Which of the following is the right description about the effect of alcohol consumption on functions of the body? ( ) A.
An individual can speed up the rate at which alcohol leaves the body. B.
Alcohol can affect the semi-circular canals, which leads to an increase in susceptibility to disorientation and motion sickness. C.
Small amounts of alcohol in the human system increase judgment and decision-making abilities.
判断题
单位质量的甲烷产生的温室效应是二氧化碳的25倍 。
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