Which of the following statements is false: ( )
A: Suspended solids are unstable and can be easily removed from the water.
B: The colloidal particles are usually charged by adsorbing ions.
C: The sizes of dissolved matters are less than 1 nm.
D: The pollution of natural water only comes from the natural environment.
A: Suspended solids are unstable and can be easily removed from the water.
B: The colloidal particles are usually charged by adsorbing ions.
C: The sizes of dissolved matters are less than 1 nm.
D: The pollution of natural water only comes from the natural environment.
举一反三
- All mineral water is ‘natural’, coming straight from a natural spring.
- The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.
- Which of the following measures cannot help to save water? A: Prevent wastewater from being poured into the rivers. B: Promote water recycling systems. C: Use less washing machines. D: Let people fully aware of the importance of saving water.
- Evaporation from sea water is about 5% less than from fresh water, ______(当其他所有条件都相同时).
- The use of water referred in this passage is ______. A: a new concept compared with other ways of natural resources B: less expensive than petroleum and other means of energies C: now being used more from the ocean than from rivers and lakes D: being developed to supplement other sources of energy