在投用二氧化碳加热器后，通过低低压蒸汽将高压二氧化碳温度提高至（）以上。 A.70℃

如图所示，在竖直平面内的直角坐标系中，一个质量为m的质点在外力F作用下，从坐标原点O由静止开始沿直线ON斜向下运动，直线ON与y轴负方向成θ角，则物体所受拉力F的最小值为(　　)

A．mgtan θ

B．mgsin θ

C．mg/sin θ

D．mgcos θ

Chien, Linh and Trang formed a new limited liability company in January 2011. They decided that the company would specialise in selling high quality food products. Before the company was formed, Chien, Linh and Trang decided to enter into several transactions so that the company could commence trading as soon as the legal formalities relating to formation had been finalised.Chien was responsible for sourcing and selling seafood. In October 2010 he ordered 500 boxes of crab meat with the intention of selling it to the customers of the new company. He wrote to 50 prospective customers of the new company informing them that a maximum of three boxes of crab meat would be available for purchase by each customer at a price of 20 million dong per box. The remainder would be advertised for general sale.Linh was responsible for sourcing and selling herbs. She secured an agreement with a supplier of saffron, an expensive herb, and has already been told informally by five of her restaurant contacts that they would be prepared to pay 30 million dong per box for this product. She sent a box of saffron to each customer with an invoice for 30 million dong in November 2010.Trang agreed to take responsibility for sales of luxury chocolates. He had little knowledge of the products, but in December 2010 entered into an agreement with a Vietnamese trader to purchase 1,000 kilos of chocolates specially imported from Switzerland.Required:

(a) Explain whether legal binding contracts have been formed on behalf of the company by the actions of Chien, Linh and Trang, and the rights and obligations created by their actions. (7 marks)

“忧者见之而忧，喜者见之而喜”是（）的表现.

A.心境

B.激情

C.应激

D.美感

巩膜炎一般不会出现的症状有

A．畏光、流泪

B．无分泌物

C．睫状体有压痛

D．暗红色充血

E．充血远角膜缘

肾性高血压患者可选用

A．美加明

B．普萘洛尔

C．可乐定

D．卡托普利

E．氢氯噻嗪