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【多选题】
下列属于肥料引起的水体污染的有( )。A.
肥料污染使氮、磷及其它营养物质增多，造成水体富营养化。
B.
氮肥施用过量导致水体 硝酸盐污染，可引起新生婴儿高铁血红蛋白症。
C.
未经消毒处理的人、畜粪便及污灌的污水均含有 大量病毒、病原菌及寄生虫，不仅危害水生生物，而且使人、畜可能感染疾病。
D.
氮肥的过量施用，可引起大气中氮氧化物 （ NO x ）增加，导致臭氧层中的臭氧分子过量消耗，使紫外线辐射穿透大气层进入生物圈的强度加大，对各种地球生物，包括对人类的生存和发展造成巨大威胁。
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【单选题】One thousand dollars a month is not a fortune but would help cover my living _____ .
A.
bills
B.
expenses
C.
prices
D.
charges
【单选题】The real detective lives in 'an unpleasant moral twilight' because______.
A.
he is an expensive public servant
B.
he must always behave with absolute legality
C.
he is obliged to break the law in order to preserve it
D.
he feels himself to be cut off from the rest of the world
【单选题】When I came in, they were ____________ in their discussion
A.
to absorb
B.
absorbing
C.
absorbed
D.
being absorbed
【简答题】(语法填空)When I came in, they were ________ breakfast.
【单选题】They ________ the maths problem when I came in.
A.
worked on
B.
were working on
C.
were working
D.
were working for
【单选题】______ of money prevented us from taking a holiday this year.
A.
Limitation
B.
Freedom
C.
Expense
D.
Lack
【单选题】They were having a violent quarrel but______when I came in.
A.
broke up
B.
cut off
C.
broke off
D.
hung up
【简答题】Parents are fuelling bad behavior among their children by attempting to 'buy' their love with expensive gifts nowadays. Over recent decades we seem to have created a 'must have' culture among our youn...
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