如图甲在一只薄塑料袋中装水过半(未满),用细线扎紧袋口,用弹簧测力计测得其所受重力为10N;再将这个装水的塑料袋浸入烧杯内的水中(如图乙),当弹簧测力计示数为0N时,袋内水面与烧杯中的水面相比(不计塑料袋和细线的重)( )
A:比烧杯中的水面高
B:比烧杯中的水面低
C:与烧杯中的水面相平
D:高低无法判断
根据表格内容,选择正确答案。
(a)This is Mariah Carey. She is a singer. She was born in 1970. Her birthday is March twenty-seventh. She likes singing.
(b)This is Lee Young Ah. She was born in 1971. Her birthday is January thirty-first. She is a great(著名的)movie star. She likes acting.
(c)She is ZhangYining. She's a sports star. She was born in Beijing in 1981. Her birthday is October fifth. She likes singing.
(d)Do you know Bill Gates?He was born in 1955. His birthday is October twenty-eighth. He likes playing golf (高尔夫球).
(e)This is Li Lianjie. He was born in Beijing in 1963. His birthday is April twenty-sixth. He is a great actor. He likes reading.
诗言志,史铸诗。诗人***以其气势磅礴的诗篇反映了中国革命的峥嵘岁月。下列诗句,以“一唱雄鸡天下白” (1949年新中国成立)为原点,按由近及远排列正确的是( )。
①“外侮需人御,将军赋采薇”。 ②“金沙水拍云崖暖,大渡桥横铁索寒”。
③“秋收时节暮云愁,霹雳一声暴动”。 ④“宜将剩勇追穷寇,不可沽名学霸王”。
如图所示,竖直半圆环中有多条起始于A点的光滑轨道,其中AB通过环心O并保持竖直.一质点分别自A点沿各条轨道下滑,初速度均为零.那么,质点沿各轨道下滑的时间相比较( )