更多"Acid rain leads to fish mortality. "的相关试题:
[单项选择]Acid rain leads to fish mortality. Many species of fish cannot survive in aquatic environments where the pH is below 5.0. If the water is too acid, the gill systems of many kinds of fish can be damaged. (61) , the acid alters the blood chemistry of all fish. As a result, the fish population in an acidic environment decreases (62) becomes extinct. Approximately 20 percent of the lakes in Scandinavia are without fish. Moreover, in Nova Scotia the (63) salmon industry may be threatened by the decrease of salmon in rivers and streams. The impact is also (64) in the waters of Ontario and Quebec, where fish populations are (65) the decline.
What potential remedies exist for the acid rain (66) The experts disagree. Some say new environmental laws should be (67) to control the emission of pollutants in the atmosphere. Some say that if we had known how serious acid rain was, we would have planned (68) to prevent it. (69) , all
A. Likewise
B. Besides
C. Thus
D. Otherwise
[填空题]results in "Acid rain" 71. ______
is already the 2nd largest source of electricity in the U. S. 72. ______
may give off more radiative pollution into the air than a nuclear plant 73. ______
can be taken only when large enough collector plates are built 74. ______
is the cleanest practical source of electricity 75. ______
costs 30% less than coal-fired power in France 76. ______
is less easy to subject to shortages caused by strikes and natural disasters 77. ______
is less threatened by international crises 78. ______
will not be considered as a supplement to conventional electricity for several decades 79. ______
could contribute to global warming 80. ______
Our demand for electricity is climbing so fas
