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Recruiting New Members 招募新成员 Write an ad of about 100 words based on the following

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()在Intranet上采用协议作为通信协议,利用Internet的Web的概念和技术作为标准平台,通过防火墙把内部网和Internet隔开。

Set an Example for the Children 为孩子树立榜样 Write an essay of 160-200 words based on the drawing. In your essay, you should 1)describe the drawing briefly, 2)explain its intended meaning, and 3)give your comments.

根据胎盘屏障结构胎盘可分为四类,牛、羊的胎盘属于

A. 上皮绒毛膜胎盘
B. 内皮绒毛膜胎盘
C. 血绒毛膜胎盘
D. 结缔组织绒毛膜胎盘
E. 子叶胎盘

A Thank-you Letter for Hospitality 感谢盛情招待 Write a letter of about 100 words based

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