材料：清朝乾隆皇帝致英王信：“咨尔国王（指英王），远在重洋，倾心向化，……天朝抚有四海……德威远被，万国来王，种种贵重之物，梯航毕集，无所不有。”
——摘自《清实录》
Animal studies are under way, human trial protocols are taking shape and drug makers are on alert. All the international health community needs now is a human vaccine for the bird flu pandemic sweeping a cluster of Asian countries.
The race for a vaccine began after the first human case emerged in Hong Kong in 1997. Backed by the World Health Organization (WHO), three research teams in the US and UK are trying to create a seed virus for a new vaccine. Their task is formidable, but researchers remain optimistic." There are obstacles, but most of the obstacles have been treated sensibly," says Richard Webby, a virologist at St. Jude Children’s Research Hospital in Memphis, Tennessee.
The biggest challenge is likely to be the rapidly mutating virus. Candidate vaccines produced last year against the H5N1 virus are ineffective against this year’s strain. Scientists will have to constantly monitor the changes and try to tailor the vaccine as the vi
A. Slightly approves of
B. Depicts neutrally
C. Slightly disapproves of
D. Completely rejects
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NEW
PRODUCT WILL SAVE LIVES{{/B}} Drinking water that looks clean may still contain bugs, which can cause illness. A small company called Genera Technologies has produced a testing method in three stages, which shows whether water is safe. The new test shows if water needs chemicals added to it to destroy anything harmful. It was invented by scientist Dr Adrian Parton, who started Genera Technology five years ago. He and his employees have developed the test together with a British water company. A [单选题]低压接地线和个人保安线的截面积不得小于（ ）mm2。
A.12 B.16 C. “在此工作！” D.36 [填空题]《铁路旅客运输服务质量规范》（铁总运〔2016〕247号）规定，保洁工具<--NRC-->存放。
[判断题]国家标准中。A4图纸的幅面尺寸为210X297，A3的图纸的幅面尺寸为295X420.
[单选题]放翁指诗人
A.陆游 B.白居易 C.李商隐 D.柳宗元 [单选题]《铁路劳动安全》中把常见物体打击常见事故类型分为坠落物无伤人、飞溅物伤人、抛落无伤人、惯性伤人，其中属于抛落物伤人的时（ ）。（《铁路劳动安全》第157页倒7行）
A.撬棍滑脱伤人 B.货物列车上坠落绳索伤人 C.打桩碎物屑伤人 D.工具零件高处倒落伤人 [单项选择]依据流行病学统计，女性发病多于男性的疾病有( )。
A. 白斑 B. 龋病 C. 盘状红斑狼疮 D. 地图舌 E. ANUG 我来回答: 提交
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