在括号里填上适当的词语，并说说自己的体会。 1．商人（ ）说：“别哄我了！一定是你把

如图所示，甲、乙两光滑圆轨道放置在同一竖直平面内，甲轨道半径是R且为乙轨道半径的2倍，两轨道之间由一光滑水平轨道CD相连，在水平轨道CD上有一轻弹簧被a、b两个小球夹住，但不拴接．如果a、b两个小球的质量均为m，同时释放两小球，且要求a、b都能通过各自的最高点，则弹簧在释放前至少具有多大的弹性势能？

John likes     1   (read) very much. His father has a library and the boy    2    (read) most of the books in it. So he often    3    (borrow) books from the school library. He reads books when he    4    (be) free and does nothing but reading at home on Weekends. Once he even    5   (read) a novel in class because it was very interesting. Of course he couldn’t hear what the teacher    6   (say). So he    7    (fall) behind. The headmaster had a talk with him and told him    8   (not read) novels in class. At last, he realized that he was wrong and said “I’m sorry, I    9    (not do) it again.” And now he reads books after he finishes    10    (do) all his homework..

CT平扫，下列哪种病变肝脏密度不减低反而升高()

A．脂肪肝

B．Reye病

C．酒精性肝病变

D．血色病

E．糖原累积症

由政府价格主管部门或其他有关部门，按照定价权限和范围，规定基准价及其浮动幅度，指导经营者制定价格的是

A．价格
B．市场调节价
C．政府指导价
D．政府定价
E．经营者

有些煎膏在储藏一定时间后，常有糖的结晶析出，俗称（）。