Small, pink and very ugly. Hardly the qual

题型:单项选择题

问题:

Small, pink and very ugly. Hardly the qualities of a star, but they describe the deformed mouse that was the media darling at a recent science exhibition in Beijing. With a complex tissue structure in the shape of a human ear grafted on to its back, the rosy rodent was a stunning symbol of the serious strides China is making in the field of biotechnology.

China is fast applying the latest life-science techniques learned from the West to aggressively pursue genome research. It’s establishing its own centers of technical excellence to build a scientific base to compete directly with the United States and Europe. With a plentiful supply of smart young scientists at home and lots of interest abroad biotechnology is on the brink of a boom in China. And in the view of foreign scientists, Beijing is playing a clever hand, maximizing the opportunities open to them.

For the moment, the cooperation exists mostly with Europe and the U. S. But Asia’s other biotech leaders, Japan, Singapore and Korea, also are recognizing China’s potential as an attractive low-cost base to conduct research. These partnerships—and China’s advancement in the field of biotechnology—could help benefit the rest of Asia: China’s rapid progress in improving crop yields will address food-security concerns in the region. In addition, China is more likely to focus on developing cheap technology that its predominantly poor population and those of other Asian countries—can afford.

There remain, however, serious barriers to the development of a p biotech industry. Among them are a poor domestic legal framework, weak enforcement of intellectual-property rights and loose adherence to international standards. China is a signatory of the International Bio Safely Protocol, which should mean adherence to global standards governing the conduct of field trials. But some observers are skeptical. "The regulations look good, but I haven’t met one scientist who believes they are being fully adhered to," says a European science analyst.

If shortcuts are taken, then some of the recent scientific achievements trumpeted in the official press may never make it to market. But no matter how strict lab test are, other problems lie in wait. For example, there is a number of tasks it would take years to fulfill in the patents office, says one lawyer, leaving innovators with little protection if they take a product to market in China.

The mouse on display is most significant in that ().

A. it has an ear in the shape of a human ear

B. it is unusually small and ugly as a star

C. it is the focus of the media at the exhibition

D. it indicates China’s progress in biotechnology

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班集体形成的重要标志之一是( )。

A.成立了班委会

B.开展了班级工作

C.形成了正确的集体舆论

D.确定了班级工作计划

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脑棘球蚴(包虫)病是一种寄生虫病,由犬绦虫细粒蚴引起,以下关于它的叙述哪项是不正确的()

A.本病为自然疫源性疾病

B.本病的传染源为狗,人和狗接触密切借污染的手指或饮食时吞入虫卵而感染

C.成人多见,成人发生率是儿童数倍,临床症状典型

D.外周血检出棘球蚴,卡索尾皮内试验阳性和温伯格补体结合试验阳性,就可诊断棘球蚴病

E.目前尚无杀灭棘球蚴特效药,建议使用手术切除进行治疗

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一男性病人,因黄疸来诊,检验检查符合阻塞性黄疸,查体胆囊肿大,为鉴别壶腹区癌与胆囊底部结石,下列体征哪项支持后者()

A.皮肤呈黄绿色

B.皮肤呈金黄色

C.皮肤呈柠檬色

D.胆囊坚硬而不规则

E.胆囊光滑

题型:单项选择题

一个质量为2Kg的木块放在水平地面上,受到一个大小为20N,方向水平向左的拉力作用,同时用沿水平向右的轻弹簧拉着处于静止.要使木块静止在地面上,弹簧的最小伸长量为8cm,最大伸长量为12cm.求弹簧的劲度系数和木块与地面间的动摩擦因数分别是多少?(最大摩擦力等于滑动摩擦力)

题型:单项选择题

泵站操作工应经常检查六氟化硫接触器的()是否在应有的范围内。

A、动触电

B、静触点

C、操作行程

D、气室压力

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