A.Electron
B.Proton
C.X ray
D.neutron
A.having his name matched with the computer list
B.having every suitcase Xray checked
C.having the hand baggage Xray checked
D.passing through a door for a body check
急性胃炎的确诊依赖于()。
A.急诊纤维胃镜检查
B.B型超声波检查
C.腹X—ray平片
D.血常规检查
E.胃粘膜活检
34 .急性胃炎的确诊依赖于
A .急诊纤维胃镜检查
B . B 型超声波检查
C .腹 X — ray 平片
D .血常规检查
E .胃粘膜活检
Which of the following is NOT the characteristic of the Generation X?
A.They are well educated.
B.They all have a good job.
C.They take a pessimistic attitude towards life.
D.They are not satisfied with their jobs.
A. 贝他加速器(Betatron)
B. 线性加速器(Linear accelerator)
C. 范得格夫X光机(Van de Gaff X ray equipment)
D. 传统的X光机
What does the passage mainly discuss?
A.The production of solar light and heat.
B.The physical and chemical nature of life.
C.The conversion of Hydrogen to helium.
D.Radiation in the X - ray part of the spectrum.
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