问题 多项选择题

《国家气象灾害防御规划》中指出,建成由地基、空基、天基观测系统组成的气象灾害立体观测网,实现对气象灾害,尤其是对重点区域主要气象灾害的()的综合立体性连续监测。

A.全天候

B.全覆盖

C.高时空分辨率

D.高精度

E.逐分钟

答案

参考答案:A, C, D

单项选择题
填空题
Directions:
    
Complete the following passage by using the words in the box. Each word can only be used once.
Note that there is one word more than you need.
A. poisoned        B. destruction       C. survived       D. increased      E. especially
F. chemicals       G. concern          H. decline         I. occasionally     J. sensitive
     More recent research has shown that many kinds of amphibians (两栖动物) are declining or have
become extinct. Amphibians are animals, such as frogs, that live partly in water and partly on land. And
they have been around for over 350 million years. They have   1   three mass extinctions, including the
extinction of the dinosaurs. Why are they dying out now?
     The most serious aspect of amphibian loss, however, goes beyond the amphibians themselves.
Scientists are beginning to think about what amphibian   2   means for the planet as a whole. If the earth
is becoming unlivable for amphibians, is it also becoming unlivable for other kinds of animals and human
beings as well?
Scientists now believe that amphibian decline is due to several environmental factors. One of these factors
is the   3   of habitat, the natural area where an animal lives. Amphibians are very   4   to changes in their
habitat. If they cannot find the right conditions, they will not lay their eggs. These days, as wild areas are
covered with houses, roads, farms, or factories, many kinds of amphibians are no longer laying eggs.
     There are a number of other factors in amphibian decline. Pollution is one of them. In many industrial
areas, air pollution has   5   the rain, which then falls on ponds and kills the frogs that live there. In farming
areas, the heavy use of   6   on crops has also killed off amphibians. Another factor is that air pollution has
led to    7   levels of ultraviolet (UV) light. This endangers amphibians, which seem to be   8   sensitive to
UV light.
     All these reasons for the disappearance of amphibians are also good reasons for more general   9   .
These factors affect human beings, too.