问题
名词解释
电离辐射线
答案
参考答案:
由原子核衰变产生的α、β、γ、X射线能使受辐射物质的原子发生电离作用的能力,因而称为电离辐射线。
电离辐射线
参考答案:
由原子核衰变产生的α、β、γ、X射线能使受辐射物质的原子发生电离作用的能力,因而称为电离辐射线。
阅读理解。 | ||||
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1. Marsha’s House may be a . | ||||
A. supermarket B. hotel C. restaurant D. cinema | ||||
2. If you want to buy apples, you should go to . | ||||
A. Marsha’s House B. Country Life Market C. Wawa Village D. Next Wave Music Store | ||||
3. Arnold Swenson may be a(n) . | ||||
A. musician B. athlete C. film star D. singer | ||||
4. If you want to get a present from Next Wave Music Store, you should . | ||||
A. get there before 7:00 a. m B. be the first person to get there C. call 543-616 D. not get there later than 50 people on Saturday | ||||
5. The four forms are . | ||||
A. novels B. four pieces of news C. advertisements D. essays |