问题
填空题
光合细菌的色素主要有菌绿素a，b，c，d，e及类胡萝卜素。在不同的菌种内含量不同。（）是光合细菌进行光合磷酸化，将光能转变成化学能的媒介，而（）的主要作用是捕获光能及起光氧化的保护剂作用。
答案
参考答案：叶绿素a；类胡萝卜素
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光合细菌的色素主要有菌绿素a，b，c，d，e及类胡萝卜素。在不同的菌种内含量不同。（）是光合细菌进行光合磷酸化，将光能转变成化学能的媒介，而（）的主要作用是捕获光能及起光氧化的保护剂作用。
参考答案：叶绿素a；类胡萝卜素
| It may be necessary, in order that .future (51) can enjoy clean air, that more of the (52) is borne by long-term central government fund．As air pollution varies enormously from place to place and can, indeed, be very local, it may also be necessary for the central government to (53) money so that local authorities can (54) special local problems. That these can be significant was shown by the report made in 1970 (55) behalf of the London Boroughs Association. This (56) that in central London since 1958 smoke concentrations have decreased by 80 percent, whereas sunshine has increased by 70 percent and winter visibility has (57) threefold, There have been (58) in mortality and hospital admissions (59) with air pollution and in the response to it of bronchitis, as well as clear if less documented increases in plant types and bird (60) n the cities. |
A．allocate
B．assign
C．amass
D．attract