A:原子
B:分子
C:元素
D:单质
In the nineteenth century, a novelist would bring his story to a c____ by presenting his readers with a series of coincidences-most of them wildly improbable.
⑴Can I have an apple, please? ____ A.Thank you.
⑵Do you like milk?____ B.Yes, I like grapes.
⑶Have some pears, please.____ C.OK.
⑷Do you like grapes?____ D.Sure.Here you are.
⑸Let's buy some milk.____ E.No, I don't like milk.
不等式x﹣4<0的解集是____ .