问题
单项选择题
X线有物理特性、化学特性和生物特性。下面哪一项属于化学特性（）
A.穿透作用
B.荧光作用
C.电离作用
D.干涉与衍射、反射与折射作用
E.感光作用
答案
参考答案：E
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X线有物理特性、化学特性和生物特性。下面哪一项属于化学特性（）
A.穿透作用
B.荧光作用
C.电离作用
D.干涉与衍射、反射与折射作用
E.感光作用
参考答案：E
| 选用方框中的单词完成短文。 | |
go shopping(购物) 3 Mary. They buy some new 4 and a big cake(蛋糕) for Mary in a supermarket(超市). Mary is a Beijing 5 fan(爱好者).She thinks Beijing Opera is very 6 .She thinks she can learn about Chinese 7 .In the afternoon Mary's parents 8 her to see Beijing Opera.In the evening Mary's parents 9 a party for Mary at home. Mary asks(请求)her 10 and her friends to her party. They have a good time. 1._____2. _____3. _____4. _____5. _____ 6. _____7. _____8. _____9. _____10. _____ |