【判断题】我国第一部完整的药学著作《神农本草》形成于四汉时期。
【简答题】在一辆小车上固定装有光滑弧形轨道,轨道下端水平,小车质量为m,静止放在光滑水平面上。今有一质量为m、速度为v的铁球,沿轨道下端水平射入并沿弧形轨道上升至某一位置B处,如图所示,然后下降离开小车。试求: (1)铁球离开小车时相对于地面的速度; (2)铁球沿弧面上升的最大高度h。
【单选题】What do you think is Dr. Black’s job? Dear Dr. Black, I like my friend Lin Tong, but we have problems now... Should I give up on this friendship? I don ’ t really want it to end ... .
A.
She is a doctor of modern sciences
B.
She is an expert in relationship
C.
She is an expert in engineering
【单选题】1949年10月1日,毛泽东在天安门城楼宣告:中华人民共和国中央人民政府今天成立了,这一事件的世界意义是
【单选题】Dear Dr. Black, I like my friend Lin Tong, but we have problems now... Should I give up on this friendship? I don ’ t really want it to end ... . 21.What do you think is Dr. Black’s job?
A.
She is a doctor of modern sciences
B.
She is an expert in relationship
C.
She is an expert in engineering
【判断题】1949 年中华人民共和国的成立是开天辟地的大事变
【单选题】以下对于沪港通的认识错误的是( )。
B.
沪股通的股票范围是上海证券交易所上证 180指数、上证380指数的成分股,以及上海证券交易所上市的A+H股公司股票
C.
港股通的股票范围是香港联合交易所恒生综合大型股指数、恒生综合中型股指数的成分股、恒生综合小型股指数的成分股和同时在香港联合交易所、上海证券交易所上市的 A+H股公司股票
【单选题】Dear Dr. Black, I like my friend Lin Tong, but we have problems now... Should I give up on this friendship? I don ’ t really want it to end ... . What do you think is Dr. Black’s job?
A.
She is a doctor of modern sciences
B.
She is an expert in relationship
C.
She is an expert in engineering
【判断题】我国第一部完整的药学著作《神农本草经》形成于西汉时期。( )
【简答题】一木块质量为 M ,静止地放置在光滑的水平面上,一质量为 m 速度为 v 的子弹水 平地射入木块,并和木块一起运动,则射入后木块的速度大小为 _________ 。