MCQOPTIONS
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| 1. |
Find the correct sequence of sentences:P: occur in the Earth's mesosphere;Q: about 40-60 miles;R: meteors, also called shooting stars,S: at an altitude of |
| A. | PRQS |
| B. | PRSQ |
| C. | RPQS |
| D. | RPSQ |
| Answer» E. | |