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【简答题】
某同学利用打点计时器所记录的纸带来研究做匀变速直线运动小车的运动情况,实验中获得一条纸带,如图所示,其中两相邻计数点间有四个点未画出。已知所用的频率为 50HZ ,则打 A 点时小车运动的速度 v A =_______m/s ,小车运动的加速度 a =_______m/s 2 。(结果要求保留三位有效数字)
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【单选题】Which category does the sentence belong to? That sounds awesome!
A.
Making invitations
B.
Accepting invitations
C.
Declining invitations
【简答题】How can words opposite in meaning be classified?To which category does each of the following pairs of antonyms belong? 意义相反的词是如何分类的?下列反义词属于哪一类?
【单选题】Which category does Holiday Inn Express belong to?
A.
Lxuxury hotel
B.
Economy and limited service
C.
Timeshare
D.
Motel
【单选题】Which category does Holiday Inn Express belong to?
A.
Luxury hotel
B.
Economy and limited service
C.
Timeshare
D.
Motel
【单选题】Which category does the sentence belong to? Maybe another time.
A.
Making invitations
B.
Accepting invitations
C.
Declining invitations
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