The major osmoregulatory problems of saltwater fishes are ( ). A: water gain and salt loss B: water loss and salt gain C: water gain and salt gain D: water loss and salt loss E: nonexistent because freshwater fishes are isosmotic to their environment

Mangroves grow in shallow and muddy salt water or brackish waters. ( )

（） is used for cylinder and cylinder head， the salt water is used for cooling the lubricating oil， the fresh water in the coolers and the charging air in the air cooler.

My teacher told me that salt water _________ (freeze) at a lower temperature than fresh water.

Choose the correct letter, A, B, C or D.Write the correct letter in boxes 22-26 on your answer sheet. What factor drives Antarctic water to move beyond the continental shelf A: The increase of salt and density of the water B: The decrease of salt and density of the water C: The rising temperature due to global warming D: The melting of fresh ice into the ocean

Fresh water ________ at a higher temperature than salt water. A: melts B: concentrates C: freezes D: resolves

Only 3 percent of the world’s water is fresh water. The rest _______ salt water. A: be B: am C: is D: are

Which of the following processes would you classify as chemical reactions? A: The burning of paper B: The formation of rust on iron C: The boiling of water D: The preparation of sugar syrup by adding sugar to hot water E: The manufacture of salt by evaporation of sea water

Water and salt both work to _______________ the water content of the body. A: regulate B: elements C: constructed D: seek E: appropriate F: traditions G: maintain H: impact I: community J: potential

According to the passage, sea-water can be turned into fresh water by A: heating it up. B: treating it with chemicals. C: taking salt out of it. D: drying it up.