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Influenza或SARS病毒的什么性质使得研制相应的疫苗十分困难？（)A．DNA复制缺乏校对使得抗原基因容
Influenza或SARS病毒的什么性质使得研制相应的疫苗十分困难？()
A．DNA复制缺乏校对使得抗原基因容易突变
B．RNA复制缺乏校对使得抗原基因容易突变
C．DNA转录缺乏校对使得抗原基因容易突变
D．基因组过大，超过100 kb
E．基因组不稳定，容易被水解
提问人：网友ygnm2003
发布时间：2022-01-06
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第4题
Avian influenza （禽流感), or "bird flu", is an infectiousdisease of animals was caused by
Avian influenza (禽流感), or "bird flu", is an infectious
disease of animals was caused by viruses that normally infect 【S1】______
only birds and, less commonly, pigs. Avian influenza viruses are
highly species-specific, but have, on rare occasions, crossed the
species barrier to infecting humans. 【S2】______
In domestic poultry (家禽), infection with avian influenza
viruses cause two main forms of disease, distinguished by 【S3】______
low and high extremes of virulence (毒性). The so-called
"low pathogenic (病原的)" form. commonly causes only mild
symptoms and may easily go undetected. The highly pathogenic
form. is far more dramatic. It spreads very rapidly through
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and has a mortality that can approach 100%, often within 48
hours.
Bird flu is not the same as SARS. Because their symptoms 【S5】______
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Influenza viruses also are more infectious and cannot be as
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The current outbreak of bird flu is different from earlier
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spread to people, but it was much more quickly contained. A
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About 1.5 million chickens were killed by an effort to remove 【S8】______
the source of the virus.
Unlike the 1997 scare, this outbreak has spread more rapidly
to other countries, increasing its exposure on people in varied 【S9】______
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【S1】
第5题
近来，由SARS病毒引起的非典型性肺炎在我国一些地方流行，但在政府采取一系列正确措施后，该病现已得到有效控近来，由SARS病毒引起的非典型性肺炎在我国一些地方流行，但在政府采取一系列正确措施后，该病现已得到有效控制． （）性免疫．
第6题
下列生物或细胞中，能够合成蛋白质的一组是（）
A.SARS病毒、根瘤菌、汗腺细胞
B.SARS病毒、淋巴细胞、汗腺细胞
C.噬菌体、T淋巴细胞、根瘤菌
D.T淋巴细胞、根瘤菌、汗腺细胞
第8题
SARS相关病毒所携带的核酸为A、DNAB、RNAC、DNA和RNAD、DNA或RNAE、Zdna
SARS相关病毒所携带的核酸为
A、DNA
B、RNA
C、DNA和RNA
D、DNA或RNA
E、Zdna
