有一道趣味智力题:某商店出售汽水,每瓶1元,每2个空汽水瓶可以换得1瓶汽水,但不可兑换现金。使用10元现金,通过购买、换领、借入汽水并归还等方式,最多可享用20瓶汽水。在获取这20瓶汽水的过程中,出现的经济现象包括①商品流通 ②易货交易 ③货币支付 ④货币借贷 ⑤非现金结算
As many as 100 species of fish, some ____ to these waters, may have been affected by the pollution.
— Have you seen ____ pencil? I left it here this morning. —Is it _____black one? I think I saw it somewhere.
---Could I use your computer for a few minutes, please? --- ________. I’m not using it myself.
It was at 10 o’clock last night __________ the visitors finally arrived at Pudong International Airport.
—How many times have you been to China? —In fact, it is the first time I __________ here.