A. Prop him up if he falls B. Spread out his weight and reduce the pressure on the rope C. Add extra weight to keep the rope tightly stretched D. To keep the centre of gravity always vertically above the rope
A. A decrease in the rate of photosynthesis B. An increase in the rate of photosynthesis C. A decrease in the rate of respiration D. No effect on either photosynthesis or respiration
A. Ingredients dissolve better in chilled water B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide D. Chilled water is more hygienic
