6÷(13-15),
=6÷215,
=45(千克);
答:这筐苹果原来有45千克.
建筑产品市场竞争的方式以()为主。
A.完全竞争
B.不完全竞争
C.招标投标
D.政府主管部门规定
—Who _________ a computer?
—The boy _________ a computer.[ ]
A. have, has
B. has, have
C. has, has
D. have, have