logo - 刷刷题
下载APP
【单选题】

人类大量燃烧矿物燃料毁坏森林,会导致( )

A.
太阳辐射增强
B.
地面辐射减弱
C.
大气逆辐射增强
D.
到达地面的可见光增强
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【多选题】导致绩效不佳的原因可能是( )。

A.
目标设置不科学
B.
规章制度不健全
C.
工作流程不合理
D.
组织领导不得力
E.
考核时间不足够

【多选题】布雷顿森林体系下的双挂钩包括( )

A.
美元与黄金挂钩
B.
各国政府或中央银行随时按官价向美国兑换黄金
C.
各国货币与美元挂钩
D.
各国货币与美元保持固定比价

【单选题】All over Europe, and in North America, there’re lakes and forests which are dead or (71) and the (72) is thought to be acid rain. What is acid rain Mr. Justin Cook, a scientist, explains: "All fossil ...

A.
All over Europe, and in North America, there’re lakes and forests which are dead or (71) and the (72) is thought to be acid rain. What is acid rain Mr. Justin Cook, a scientist, explains: "All fossil fuels, (矿物燃料),that (73) oil, coal and gas, contain sulphur. When these are burnt, for example (74) motor vehicles, they form sulphuric acid (硫酸)This (75) UP into the air, and soon it falls back to (76) , into lakes and (77) trees in forests." This can cause many local problems. 78 a result, lakes become acidic, fish disappear and trees are killed. The pollution is carried great distances by the wind, so sulphuric acid (79) in Britain can travel as far as Scandinavia (斯堪的纳维亚). Czech is one of the countries with the most acid rains and large areas of (80) consist only (81) dead trees.
B.
Is there (82) that can be done about acid rain Mr. cook says: "The rain (83) of acid rain is (84) power stations to install filters that (85) the acid getting out into the air. Here in Britain, the only (86) that has been taken is that the chimneys are built (87) so that the pollution is more distributed." If the petrol used in motor vehicles (88) lead--free, then it Would be possible to filter exhaust fuses (废气) which are a (89) cause of pollution. But these filter mechanisms (机械装置)can not work (90) the leads is removed.

【多选题】森林的作用主要有哪些?

A.
蓄水保土
B.
调节气候
C.
改善环境
D.
提供林产品