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【简答题】
两个完全相同的物块A、B,质量均为m=0.8 kg,在同一粗糙水平面上以相同的初速度从同一位置开始运动。图中的两条直线分别表示A物块受到水平拉力F作用和B物块不受拉力作用的v -t图像,求: (1)物块A所受拉力F的大小; (2)8 s 末物块 A 、 B 之间的距离 x 。
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【简答题】Mary's performance improved dramatically after her teacher singled her out for praise in class．
【单选题】白酒总酯计算公式中c代表什么
A.
硫酸(1/2H2SO4)标准滴定溶液的实际浓度
B.
乙酸乙酯的摩尔质量
C.
空白试验消耗硫酸标准滴定溶液的体积
D.
样品消耗硫酸标准滴定溶液的体积
【单选题】白酒总酯计算公式中88代表什么
A.
硫酸(1/2H2SO5)标准滴定溶液的实际浓度
B.
乙酸乙酯的摩尔质量
C.
空白试验消耗硫酸标准滴定溶液的体积
D.
样品消耗硫酸标准滴定溶液的体积
【单选题】The audience, hostile at first, were greatly ______ by her excellent performance.
A.
annoyed
B.
encouraged
C.
impressed
D.
depressed
【单选题】When Helen saw his tutor nod ________ to her, she calmed down and went on with her performance.
A.
encouragingly
B.
amazingly
C.
interestingly
D.
astonishingly
【单选题】in Super Girls that Duan Linxi became known to almost all teenagers.
A.
So successful her performance was
B.
So successful was her performance
C.
So her performance was successful
D.
So was her successful performance
【单选题】The singer was ______during the performance.
A.
at her better
B.
at her best
C.
better
D.
on her best
相关题目：
【简答题】Mary's performance improved dramatically after her teacher singled her out for praise in class．
【单选题】白酒总酯计算公式中88代表什么
A.
硫酸(1/2H2SO5)标准滴定溶液的实际浓度
B.
乙酸乙酯的摩尔质量
C.
空白试验消耗硫酸标准滴定溶液的体积
D.
样品消耗硫酸标准滴定溶液的体积
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