Who discovered X-rays?? Par. 1|Par. 4|Par. 3|Par. 2
举一反三
- Who discovered X-rays? A: Par. 1 B: Par. 2 C: Par. 3 D: Par. 4 E: Par. 5
- Who discovered X-rays? A: Par. 1 B: Par. 2 C: Par. 3 D: Par. 4 E: Par. 5
- Who discovered X-rays? A: Par. 1 B: Par. 2 C: Par. 3 D: Par. 4 E: Par. 5
- What are the four characteristics of X-rays? A: Par. 1 B: Par. 2 C: Par. 3 D: Par. 4 E: Par. 5
- What are the four characteristics of X-rays? A: Par. 1 B: Par. 2 C: Par. 3 D: Par. 4 E: Par. 5