A high negative ion count is likely to be found _______.
A: near a pond with a water pump
B: close to a slow-flowing river
C: high in some barren mountains
D: by a rotation water sprinkler
A: near a pond with a water pump
B: close to a slow-flowing river
C: high in some barren mountains
D: by a rotation water sprinkler
举一反三
- A high negative ion count is likely to be found ______. A: near a pond with a water pump B: close to a slowly flowing river C: high on some barren mountains D: near a fountain
- The best irrigation water is river water, pond water and lake water A: 正确 B: 错误
- The tap water is flowing water, and its oxygen content is pretty high which can benefit the volatilization of the tea scent. A: 正确 B: 错误
- Mean high water is the average height of（）. A: The higher high waters B: The lower high waters C: The lower of the two daily tides D: All high water
- Water attains the boiling temperature quicker in the high elevations than at the low level. Because: A: . the air pressure is lower at high elevations B: . the gravitational force is low in the mountains C: . the sunlight is high in the higher elevations D: . All of them