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【单选题】
下列关于计算机病毒说法中,正确的一条是()A.
计算机病毒将造成计算机的永久性物理伤害
B.
计算机病毒是一种通过自我复制进行传染的、破坏计算机程序和数据的小程序
C.
计算机病毒是一种感染在CPU中的微生物病毒
D.
计算机病毒是针对计算机人员身体有害的生物病毒
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【简答题】DJs (disc jockeys) are the people who play and present music on the radio, or in nightclub. A VJ (video jockey) is a person who introduces music videos on television. VJs were first seen on television...
【单选题】The people in the Kiss Nightclub were trying to escape from the fire but were ______ in smoke.
A.
covered
B.
trapped
C.
arrested
D.
scared
【简答题】一简谐振动的表达式为 ,已知 t = 0时的初位移为0.04 m,初速度为0.09 m/s,则振幅A =____ m、初相 =____ .(前空填4个字符,后空填6个字符)
【简答题】一弹簧振子沿 x 轴作简谐振动(弹簧为原长时振动物体的位置取作 x 轴原点).已知振动物体最大位移为 x m = 0.4 m 最大恢复力为 F m = 0.8 N ,最大速度为 u m = 0.8 p m/s ,又知 t = 0 的初位移为 + 0.2 m ,且初速度与所选 x 轴方向相反. (1) 求振动能量; (2) 求此振动的表达式.
【简答题】一简谐振动的表达式为,已知 t = 0时的初位移为0.04 m,初速度为0.09 m/s,则其振幅A =_____________。
【单选题】Sad-Ohs is a themed nightclub that is aimed at the over 40’s. What kind of segmentation is being used by the owners of this nightclub?
A.
Age
B.
Occupational
C.
Geographic
D.
Socio-economic
【单选题】A fire broke out in a nightclub last week， ￡2，500 worth of damage．
A.
causing
B.
caused
C.
to cause
D.
having caused
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