生产商品的社会劳动生产率越高，其价值量越大；反之越小。（）

分类是学习和研究化学物质及其变化的一种常用的基本方法。家庭常用的调味品、人的正常生理活动所必不可少的氯化钠，它与下列哪组属于同一类物质[ ]

A．氢氧化铝、氢氧化钠

B．盐酸、硫酸

C．二氧化硫、二氧化碳

D．碳酸钠、硫酸铜

单人复苏时，心脏按压15次进行口对口呼吸的次数为

A．1次

B．2次

C．3次

D．4次

Junaid paid Rs. 50,000 to Wellness Slimming Centre (‘Centre’) for a six weeks’ session of aerobics classes. During the first half of the session the aerobics instructor missed half of the scheduled classes and in the second half no classes were held due to non-availability of the instructor. Throughout the session Junaid and others complained to the Centre’s Manager, who promised to arrange classes to make up for the missed classes. However, this did not happen and the session expired. Thereafter, Junaid served a legal notice on the Centre calling for a refund of the fee deposited along with Rs. 1,000,000 as compensation for the mental anguish and loss of his time; otherwise he would initiate legal proceedings against them for the same. In response, the Centre apologised and offered Junaid the opportunity to join the next six weeks session free of charge.Required:Advise Junaid what legal action he can bring against the Centre and what are the chances of its success. (10 marks)

下列是用化学方程式表示的化学变化，请在每小题后的横线上注明能量的转化形式。

(1)Zn+Ag₂O+H₂OZn(OH)₂+2Ag____________________________________________。

(2)2C₂H₂+5O₂4CO₂+2H₂O__________________________________________________。

(3)6H₂O+6CO₂C₆H₁₂O₆+6O₂______________________________________________。

(4)CaCO₃CaO+CO₂↑______________________________________________________。

（）称为中期财务会计报告。

A、年度报告

B、半年度报告

C、季度报告

D、月度报告