题目: 大家日常生活中食用的酸奶、干酪、奶油等乳酸菌发酵产品,发酵这些产品用到的乳酸菌基本上为野生菌株,从保证食品安全的角度出发,利用基因工程技术应将乳酸菌的什么基因予以敲除()。A.产酶基因B.产细菌素基因C.耐氧相关基因D.耐药基因 答案: 参考答案:D
题型:选择题 What a table! I've never seen such a thing before.It is________it is long. [ ]A. half not as wide as B. wide not as half asC. not half as wide as D. as wide as not half 查看答案
题型:填空题 某班一个小组8名学生身高如下:学 号12345678身高/米1.541.501.541.581.461.581.601.54(1)这个小组平均身高______米.(2)身高的中位数是______米.(3)身高的众数是______米. 查看答案
题型:选择题 I don't of your sending your daughter to Britain to study,because she is too young.A.agree B.approveC.supportD.assess 查看答案