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刷刷题刷刷变学霸
举一反三
【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.
【单选题】Renewable Energy Sources Today petroleum (石油) provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in power stations, to cover one-quarter of our e...
A.
is the first hydroelectric dam in the world.
B.
is of the same size as the US’s Hoover Dam.
C.
can generate around 3% of world electricity.
D.
is the largest hydroelectric dam in the world.
【单选题】在已取得ISM认证的期租船上任职的轮机长，每月需向船东如实报告：()Ⅰ、船舶燃料消耗量Ⅱ、船舶燃料申领量Ⅲ、船舶燃料消耗贮存量
A.
Ⅰ+Ⅱ
B.
仅Ⅱ对
C.
Ⅱ+Ⅲ
D.
Ⅰ+Ⅱ+Ⅲ
【多选题】驾驶货车在车流量较大的城市道路行驶，可以降低燃料消耗的做法有:()
A.
轻踩加速踏板，平稳起步
B.
保持合适的跟车距离
C.
用带挡滑行的方式控制车速
D.
快速频繁变更车道