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【简答题】
划船时,浆向后划水,船才会向前行驶;溜旱冰时,相对静止的两人,只要一人用力推对方,两人会向相反方向运动。上述现象所共同遵循的一条物理规律: ____________________ 。
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【简答题】It was the very place _________ the soldiers fought over sixty years ago. A．that B．which C．where D．there
【单选题】The wooden house is still in excellent condition ______ it was built over 100 years ago.
A.
since
B.
because
C.
despite
D.
though
【简答题】A．The basic foundations of democracy were created over 200 years ago. B．Early leaders loved democracy, not hated it. C．America is no different now than 200 years ago. D．The meaning of democracy has ch...
【单选题】Zhang Liang was a cook years ago, but he______ a model over the years.
A.
has become
B.
became
C.
becomes
D.
has been
【简答题】How old is “old”? The answer has changed over the years. Two Hundred years ago, you were old at 35. At the beginning of the 20th century, the average life span (平均寿命) was 45. In 1950, 70-year-olds wer...
【单选题】The IPCC announcement three years ago that 'most of the warming observed over the last 50 years is'______.
A.
possibly due to human activities
B.
possibly because human activities
C.
due to likely human activities
D.
human activities likely attributable
【单选题】关于天体和天体系统的说法正确的是 [ ]
A.
天体是宇宙中各种物质的通称，其体积和质量都大于或等于月球，小于或等于太阳
B.
所有天体都相互吸引、相互绕转，处于不断运动之中
C.
总星系是目前人们所能观测到的宇宙部分
D.
银河系的中心部分是河外星系
【简答题】How old is “old”? The answer has changed over the years. Two hundred years ago，you were old at 35.At the beginning of the 20 th century，the average life span（平均寿命）was 45. In 1950，70-year-olds were re...
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