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问题 单项选择题

物理常数的测定：“全熔”的温度（）

A．初熔时的温度至全熔时的温度 

B．供试品在毛细管内开始局部液化出现明显液滴时的温度 

C．供试品在毛细管内全部液化时的温度 

D．平氏黏度计 

E．旋转式黏度计

答案

参考答案：C

单项选择题

上颌骨骨折后坠引起的呼吸困难，最主要的抢救措施是（）

A.气管切开

B.环甲膜穿刺

C.上提并固定上颌骨

D.清楚口腔分泌物

E.经鼻腔或口腔插管
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单项选择题

A newspaper polled 1,000 likely voters about which of the following issues, if any, played an important role in their decision-making process for an upcoming election: education, crime, and/or taxes. Of the voters surveyed, a total of 495 named education, 490 named crime, and 440 named taxes. In the figure above, the overlapping areas between two circles represent the people who named only those two items; the overlapping area between the three circles represents those people who named all three issues.

What percentage of those polled named only education or only crime but no other issue ？（）

A. 25.5%

B. 31.5%

C. 39%

D. 55%

E. 98.5%
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