碳酸钠与过量稀硫酸:with which hand do you write?

with which hand do you write? with which hand do you write? 脑筋急转弯 With which hand do you write? with which? do proc1 with(x),y 这句是什么意思 please identify maunfacturers/retailers with which you do business.什么意思？ European do surf with browsers which is opened这句话什么意思？ to study alone. to study with several people togerther. Which do you prefer? By the hand /with the hand? Which floor do you____?