更多"______ have brought about environme"的相关试题:
[填空题]______ have brought about environmental problems attendant on river use.
[单项选择]Climate change has brought about such problems as bleaching-induced (47)______ of corals.
Bleaching occurs when corals are stressed by high temperature or other (48)______ changes, and lose their symbiotic algal cells. When they lose these cells, which provide the corals with essential (49)______ and give them their color, they can die. Reefs are important for livelihoods, and fisheries and tourism, and are the main (50)______ along the eastern African coast as well as (51)______ many of the islands of the Western Indian Ocean.
In college during the 70s, I joined an expedition to the Malindi Marine Park -- one of the first MPAs (marine protected areas) to be established in Africa-where we (52)______ in a well-protected reef. But over the years, that reef has been completely devastated by the bleaching. It was truly (53)______ to see such a vibrant and healthy reef reduced almost to the status of an unprotected one.
Recently, coral reefs have received a great deal of atte
[简答题]The environmental problems exist because adequate measures for preventing them were not taken in the past.
[单项选择]Most environmental problems exist because adequate measures for preventing them ()taken in the past.
A. was not
B. were not being
C. were not
D. was no to be
[简答题] Computers have brought about many change in our life.(71){{U}}With the developing of science and technology, the use of electronic computers is growing rapidly year by year in various fields of man’s activities.{{/U}} They have been of great help in scientific research, engineering and our daily life. for example computers are sweeping the word’s office, taking with them much of the routine clerical work that secretaries do,.(72){{U}}Computers also make it possible will stay at home and work.{{/U}}
(73){{U}}Computers are widely used in daily life. Because of their efficiency and convenience, computer are very popular in daily life.{{/U}} Many writer use them to write and correct articles and quiet a few people frequently communicate with each other by computer. Even small children are use them to make rapid progress in their study. Stores make use of them to keep records of their stock and send bills to their customers while office use computers to type letters and keep trac