皮皮学,免费搜题
登录
搜题
【单选题】
如图示为在北戴河旅游景点之一的南戴河场有两个坡度不同的AB和AB/(看作斜面)。甲、旅游者分乘两个撬从插有红旗的A点由静止出发同时沿AB和AB/,最后都停在水平沙面BC上.设撬和沙面间的动摩擦因数处处相同,者保持一定姿势坐在撬上不动。下列说法中正确的是()
A.
甲在B点的速率等于B/点的速率
B.
甲的滑行总路程比乙短
C.
甲全部滑行过程的水平位移一定比乙全部滑行过程的水平位移大
D.
甲、乙停止滑行后回头看A处的红旗时视线的仰角一定相同
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【判断题】Determine whether the following statements are true or false. Put a “T” if the statement is true, and put an “F” if the statement is false. Animals can communicate with each other in a complicated way...
A.
正确
B.
错误
【判断题】If timer T0 works in mode 2, the initial values TH0 and TL0 must be the same.
A.
正确
B.
错误
【单选题】If the striped T-shirt and the round-necked shirt are at the same price, 60 Yuan, how much will they cost Jasmine if she can afford them?
A.
120 Yuan
B.
60 Yuan
C.
90 Yuan
D.
30 Yuan
【简答题】ADSL技术是指在普通()上实现( )高速数据传输的接入技术,其频谱安排分为( ) 和回波对消(EC)两种方式,其中前者将频谱分为电话、( )和( )三个相对独立的信道, 避免了相互干扰。 可选项: A.光纤 B.同轴电缆 C.双绞线 D.无线信道 E.对称 F.非对称 G.频分复用 H.时分复用 I.空分复用 J.码分复用 K.上行数据 L.下行数据 M.音频 N.视频
【单选题】All the senior leaders are members of the same family. _____, I’m likely to have to move if I want to get promoted.
A.
Though
B.
Meanwhile
C.
However
D.
Therefore
【判断题】If the input x(t) is a sinusoidal signal, the steady-state output will also be a sinusoidal signal of the same frequency, but with possibly different magnitude only.
A.
正确
B.
错误
【简答题】The graph below shows the turnover of three kinds of retail outlets, all owned by the same company, during a three-year period. Check out the statements below based on the graph. Mark T if the descrip...
【单选题】下列选项中不可以为纳税人提供纳税担保的是
A.
税务机关认可的有纳税担保能力的保证人
B.
纳税人自己以其未设置担保物权的财产提供的担保
C.
第三人以其未全部设置担保物权的财产提供的担保
D.
欠缴税款、滞纳金的保证人
【简答题】阅读理解。 If you go to Beijing and Shanghai, you can see the same and the different points between them. In some ways they look the same, in some ways they look different. Both of them have tall buildings...
【单选题】If segments appear in the same position but the mutual substitution does not change the meaning, they are said to be in ____.
A.
contrastive distribution
B.
free variation
C.
complementary distribution
D.
distinctive features
相关题目: