热原是微生物产生的内毒素,其致热活性中心是()
A.蛋白质
B.多糖
C.磷脂
D.脂多糖
E.核糖核酸
参考答案:D
My father ____________ any computer games. He has a great sports
collection.[ ]
A. has
B. doesn’t have
C. don't like
D. like
科学的任务还是要从必然性中发展偶然性。