我们看到硫酸铜溶液呈现兰色,是由于它吸收了由光中的()。
A.兰色光波
B.绿色光波
C.黄色光波
D.红色江波
参考答案:C
完成句子。
1. Time for breakfast. My mum is (cook) breakfast now.
2. My hands are . I want to wash my hands.
3. This is a towel. (擦干) your hands, please.
4. Here are three (bus).
5. The red toothbrush is (我的).
6. You can wash hands in the (水槽).
7. Li Ming needs a pair of (skate).
8. Christmas is a (west) holiday.
9. I (eat) cereal for breakfast yesterday.
10. Danny usually (walk) to school.
感染性休克的常见病原体为()。
A.革兰阴性细菌
B.革兰阳性细菌
C.病毒
D.支原体
E.钩端螺旋体