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- 共用题干 EarthquakeHow does an earthquake start?What makes an earthquake happen? The rock of the earths...
- 共用题干 第二篇Good Table MannersManners play an important part in making a favorable impression at the di...
- 共用题干 Travel Across AfricaFor six hours we shot through the barren（荒芜的）landscape of the Karoo desert...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- The expedition reached the summit at 10:30that morning.
- 共用题干 Animals “Sixth Sense”A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in Dec...
- 共用题干 A Star Is Born1 The VLT (Very Large Telescope) is the worlds largest telescope（望远镜）and is taki...
- 共用题干 The Value of MotherhoodIn shopping malls,the assistants try to push you into buying“a gift to ...
- 共用题干 Wide World of RobotsEngineers who build and program robots have fascinating jobs. These resear...
- 共用题干 Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A ...