下图表示植物细胞的质膜对物质的转运。物质转运的方向如箭头所示,黑点的数量代表物质的浓度,则该物质可能是
A.叶绿素
B.花青素
C.生长素
D.水
答案:C
磺胺类药的不良反应有()
A.肾脏损害
B.肝脏损害
C.溶血性贫血和粒细胞减少
D.变态反应
E.胃肠道反应
Khanh is the manager of a shop that sells high quality paintings and reproductions of famous artworks. On 1 November she wrote to Kim and Suong, two established customers, offering the opportunity to purchase reproductions of a painting by a famous artist, each signed by the artist. The letter specifi ed a price of 10 million dong.Khanh’s fi rst letter was to Kim. However, immediately after sending the letter, Khanh discovered she had mis-typed the price as 1 million dong. Khanh immediately wrote another letter withdrawing the offer and stating the correct price of 10 million dong. Both letters were received by Kim in the same delivery. Kim wrote back to Khanh immediately accepting the offer of 1 million dong.Suong replied to Khanh’s letter stating that she would be delighted to accept the offer, but as she was given a 15% discount for her three previous purchases she assumed this would apply again. Suong wrote back to accept the offer enclosing her payment of 8·5 million dong.Khanh subsequently sold the painting to Ngoc for the full price of 10 million dong.Required:
(a) Explain whether Kim has completed a legally binding contract with Khanh by accepting the offer to sell the painting for 1 million dong. (5 marks)