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【简答题】
一个物体受到 4N 的力,产生 2m/s 2 的加速度。要使它产生 3m/s 2 的加速度,需要对它施加 N 的力。
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【简答题】With dark brown __________ on her face, she looked older than her age.
【单选题】The waiter' face, tanned to a dark brown and deeply wrinkled, reminded Suchen of a walnut shell, yet his eyes, even in the dim light, with alertness, like the eyes of a mountain lion.
A.
glittered
B.
glimmered
C.
flamed
D.
blazed
【单选题】毛泽东在《关于正确处理人民内部矛盾的问题》一文中指出社会主义社会的基本矛盾“可以经过社会主义制度本身,不断地得到解决”,其含义是 ( )
A.
社会主义社会的基本矛盾可以通过发展生产力得到解决
B.
社会主义社会的基本矛盾可以自动解决
C.
社会主义社会的基本矛盾可以通过改革来解决
D.
社会主义社会的基本矛盾可以通过社会主义革命得到解决
【单选题】n 个结点的完全有向图含有边的数目( )。
A.
n*n
B.
n* ( n - l )
C.
n / 2
D.
n ( n +1)
【简答题】One day I was doing a big clean­up when I ____ a knotted handkerchief with an old dark brown coin inside.I took one look and immediately ___ a forgettable time. In 1991,I had spent five months in Nige...
【单选题】With dark brown _______ on her face, she looked older than her age.
A.
area
B.
jar
C.
patches
D.
garden
【单选题】曲线y=e -x sinx(0≤x≤3π)与x轴所围成图形的面积可表示为( )
A.
一∫\r\n 0 \r\n 3π \r\ne\r\n -x \r\nsinxdx
B.
∫\r\n 0 \r\n 3π \r\ne\r\n -x \r\nsindx
C.
∫\r\n 0 \r\n π \r\ne\r\n -x \r\nxsinx-∫\r\n π \r\n 2π \r\ne\r\n -x \r\nsinxdx+∫\r\n 2π \r\n 3π \r\ne\r\n -x \r\nsinxdx
D.
∫\r\n 0 \r\n 2π \r\ne\r\n -x \r\nsindx一∫\r\n 2π \r\n 3π \r\ne\r\n -x \r\nsindx
【单选题】Individuals of a particular species of ground beetle are either light tan or dark brown. Light-tan beetles are predominant in habitats with light-colored sandy soils, and dark-brown beetles are predom...
A.
The reproductive success of beetles in habitats with sandy soils is greater than that of beetles in habitats with loam soils.
B.
Insectivorous birds prefer to eat light-tan beetles rather than dark-brown beetles.
C.
Ground beetles have higher rates of survival in habitats with loam soil.
D.
Insectivorous birds are predators of this species of ground beetle.
【单选题】Assume that in guinea pigs (豚鼠) , dark brown fur (B) is dominant to black fur (b). If you mate a homozygous black guinea pig with a heterozygous brown guinea pig, what proportion of the progeny will b...
A.
None
B.
1/4
C.
1/2
D.
3/4
【单选题】毛泽东在《关于正确处理人民内部矛盾的问题》一文中指出社会主义社会的基本矛盾“可以经过社会主义制度本身,不断地得到解决”,其含义是 ( )
A.
社会主义社会的基本矛盾可以通过改革来解决
B.
社会主义社会的基本矛盾可以通过发展生产力得到解决
C.
社会主义社会的基本矛盾可以自动解决
D.
社会主义社会的基本矛盾可以通过社会主义革命得到解决
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