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问题 单项选择题

1．关于麻疹流行病学下述错误的是

A．麻疹患者是惟一传染源
B．接触后7天至出疹后5天均有传染性
C．病毒存在于眼结膜、鼻、口咽和气管等分泌物中
D．通过喷嚏、咳嗽等由飞沫传播
E．也可通过粪便传播

答案

参考答案：E

选择题

已知A与B都在同一数轴上，点A表示-2，而点B和点A相距5个单位长度，则点B表示的数是（　　）

A．3

B．-7

C．7或-3

D．-7或3
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问答题

In October 2008 while Artai Construction Co Limited (Artai Co) was building a residence project, a serious accident took place because of geological causes. To rescue the project many construction materials, such as cement and sand, were needed. However, it was impossible for Artai Co to fi nd such a huge quantity of construction materials in a very short period of time. Artai Co, under such circumstances, had to negotiate with a developer of the neighbouring project and fi nally reached an agreement to buy construction materials from the developer at a very high price, three times the normal market price at that time. Artai Co fell into fi nancial diffi culty as a lot of funds had been spent on the rescue work and failed to pay the price for the construction materials as agreed. A dispute arose between Artai Co and the developer. Required: Answer the following questions in accordance with the relevant provisions of the Contract Law of China, and give your reasons for your answer:

(a) State the validity of the agreement between Artai Co and the developer with respect to the purchase of the construction materials, and who would decide the validity of the agreement; (4 marks)
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