4.According to paragraph 3, ecologists once believed that which of the following illustrated the most stable ecosystems? A. Pioneer communities B. Climax communities C. Single-crop farmlands D. Successional plant communities 你的答案: 正确答案:B ...
I have no idea ___ you mean.正确选项1.what(V)43、I like to think ___. I am always the one finding new ways to a situation or challenge.正确选项1.outside of the box(V)44、I think a big part of it is ___ we know how to...
of seeing from the rim of the Grand Canyon had its own wonders. The way the light struck in the back, the way the water fell, the way new waterfalls sprouted up in the spring because the melting snow needed a place to go—for me, the most marvelous point about the parks is their ...
Alternatively, stability can be defined as the speed with which an ecosystem returns to a particular form following a major disturbance, such as a fire. This kind of stability is also called resilience. In that case, climax communities would be the most fragile and the least stable, since the...
Which of the following statements regarding the instability of time-series models is most accurate? Models estimated with:A. a greater number of independent variables are usually more stable than those with a smaller number.B. shorter time series are usually more stable than those with longer ...
A、It is an important mechanism to ensure the accuracy of regulation. B、All kinds of regulations have feedback effect. C、Positive feedback is more prominent in regulating of body functions. D、Negative feedback can keep certain physiological functions relatively stable. 参考...
If there is an oil-supply disruption resulting in higher international oil prices, domestic oil prices in open-market counties such as the United States will rise as well, whether such countries import all or none of their oil. 题目: Which of the following conclusions is best supported by the...
20) Which of the following is the name for the economic value of all of the products that a country exports minus the economic value of its imports? A) Balance of foreign competition B) Balance of domestic competition C) Balance of trade D) Balance of payments E) Balance of supply and ...
Which of the following is incorrect “ airmail ” means “ mail by air ”“ reading-lamp” means “ lamp for reading”“ green horn ” is the horn green in color D. “ hopeless ” is “ without hope ” ___ is the meaning given in the dictionary and forms the core of word-meaning...
D. Stable 12. Which of the following group of words belong to the Denizens: A. confrere, wunderkind and mikado B. chopstick, silk and typhoon C. dream, gift and black humour D. die, skirt and husband 13. Germanic language branch of the Indo-European language family includes such languag...