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【单选题】
如图 1 所示,在水平地面上做匀速直线运动的汽车,通过定滑轮用绳子吊起一个物体, 若汽车和被吊物体在同一时刻的速度分别为 v 1 和 v 2 ,则下面说法正确的是 ( )A.
物体做匀速运动，且 v 2 ＝ v 1
B.
物体做加速运动，且 v 2 > v 1
C.
物体做加速运动，且 v 2 < v 1
D.
物体做减速运动，且 v 2 < v 1
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【简答题】Part B Directions : Read the texts from a magazine article which describes the celebration, of the New Year in, five places. For questions 61 to 65, match the name of each place (61 t0 65) to one of t...
【单选题】It's our duty to trees and flowers. [ ]
A.
watering
B.
look for
C.
take care
D.
look after
【单选题】下列关于C#面向对象应用的描述中,正确的是( )。
A.
派生类是基类的扩展，派生类可以添加新的成员，也可去掉已经继承的成员
B.
abstract方法的声明必须同时实现
C.
声明为sealed的类不能被继承
D.
接口像类一样，可以定义并实现方法
【单选题】Good technique in medicine means less pain and fewer deaths and, _____, it's our duty to master it. [ ]
A.
naturally
B.
therefore
C.
particularly
D.
similarly
【单选题】Which of the following statements is true?
A.
On each day of the celebration, people light a candle.
B.
The red candles symbolize courage and creativity.
C.
The black candle stands for the Black Liberation Flag.
D.
People dance round the candles in every evening.
【单选题】On which holiday pumpkins are a very important part of celebration?
A.
Halloween.
B.
Thanksgiving.
C.
Christmas.
D.
New Year.
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