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2007年，我国旱涝并灾的情况明显。我国往年易受洪涝影响的省份如黑龙江、吉林、广西、湖南等地区，发生了罕见旱情，一些地区因旱出现临时饮水困难。与此同时，淮河发生了流域性大洪水；西南、西北等地发生了山洪灾害。据此完成1~2题。 1、我国旱灾频发，主要原因是 [ ] A、气温比同纬度地区高 B、受副高控制范围广 C、降水量的时空变化大 D、多受大陆气团控制 2、在我国，干旱与洪涝常相伴而生，其主要形成因素是 [ ] A、季风活动 B、地面状况 C、太阳辐射 D、海陆位置
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A.
Twenty thousand years.
B.
Two to six thousand years.
C.
A thousand years.
D.
Hundreds of years.
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A.
to have translated; in length
B.
to have been translated; at length
C.
to be translated; at length
D.
to being translated; for length
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A.
the textbook cost of first-year Drummand University students
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the year in school of Drummand University students
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the age of Drummand University students
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A.
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B.
are
C.
had been
D.
were
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