pron. 哪一个, 那一个

a. Of what sort or kind; what; what a; who.

a. A interrogative pronoun, used both substantively and

adjectively, and in direct and indirect questions, to ask for, or refer

to, an individual person or thing among several of a class; as, which

man is it? which woman was it? which is the house? he asked which route

he should take; which is best, to live or to die? See the Note under

What, pron., 1.

pron. A relative pronoun, used esp. in referring to an

antecedent noun or clause, but sometimes with reference to what is

specified or implied in a sentence, or to a following noun or clause

(generally involving a reference, however, to something which has

preceded). It is used in all numbers and genders, and was formerly used

of persons.

pron. A compound relative or indefinite pronoun, standing for

any one which, whichever, that which, those which, the . . . which, and

the like; as, take which you will.