下列有关大肠杆菌的叙述,正确的是

下列有关大肠杆菌的叙述,正确的是A. 大肠杆菌以复制方式进行繁殖,其拟核是一个环状DNA分子B. 在含葡萄糖和乳糖的培养基上,大肠杆菌首先利用乳糖作碳源C. 用大肠杆菌工程菌生产干扰素时,应及时添加核酸

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We sat chatting for a few _______(分钟)after finishing our meal.

We sat chatting for a few _______(分钟)after finishing our meal.

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上述材料说明.①中华文化源远流长,博大精深.②中华文化具有兼收并蓄的特点.③中华文化得到各族

上述材料说明.①中华文化源远流长,博大精深.②中华文化具有兼收并蓄的特点.③中华文化得到各族人民的认同.④中华各民族文化都是中华文化的瑰宝.A. ①② B.②③C. ③④ D.①④.

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The World Health Organization gave a warning to the public without any When the

The World Health Organization gave a warning to the public without any When the virus of h1N1 hit Mex

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We are at your service. Don’t to turn to us if you have any further problems.

We are at your service. Don’t to turn to us if you have any further problems.A. beg B. hesitate C. de

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