(c) Methods of buying 2 books using ≦ $50 are: {16+16,16+20,16+28,16+34, 20+20... buying 1 book using ≦ $50 are: {16, 20, 28, 34} ∴ no. of ways buying 1 book using ≦ $5 = 6*8*4*6 = 1,152 Method of buying 3...
..., water tanks are universal. So you don't need to buy a matching tank. If for some reasons, matching ...
I will visit a super market, not a department store or a bookstore first , because I want to buy food and other goods during the covid19 period.
這是在花錢買一個東西時, 覺得很值得的意思. 例如: I recommend you buy this television because it has the best bang for the buck. 我建議你買這台電視, 因為它的性價比很好.
...to internet speed rather than the camera quality. Nevertheless, you should not buy iPad (7th generation) given such poor hardware configuration, as all current...
..., and even spending money. You might needed to buy those recommended book/text from schools, articles ...