题目

在生物体内含量极少，但对维持生物体正常生命活动必不可少的元素有（ ）A.Fe、Mn、Zn、Mg B.Zn、Cu、Mn、CaC.Zn、Cu、B、Mn D.Mg、Mn、Cu、Mo 答案：【答案】C【解析】组成生物体的化学元素根据其含量不同分为大量元素和微量元素两大类。（1）大量元素是指含量占生物总重量万分之一以上的元素，包括C、H、O、N、P、S、K、Ca、Mg； （2）微量元素是指含量占生物总重量万分之一以下的元素，包括Fe、Mn、Zn、Cu、B、Mo等。A.Mg属于大量元素，A错误；B.C Dear friends, we warmly welcome you to Hamilton, Canada! If you want to stay here in hotels, please make your best choice.Days Inn HamiltonAddress: 210 Main Street East Telephone: 414-6433 The number of rooms: 120Single room: $25 Double room: $35Special attractions: air-conditioned rooms, French restaurant, swimming pool, shops, coffee bar.Best Western HamiltonAddress: 1530 Stone Church Road East Telephone: 414-5620 The number of rooms: 50Single room: $12 Double room: S18Special attractions: close to the airport, telephone in each room, bar, restaurant, garage, swimming pool, free WifiComfort Inn HamiltonAddress: 1500 Stone Church Road West Telephone: 414-6446 The number of rooms: 120Single room: $15 Double room: $20Special attractions: European restaurant, television, shops, nightclub, free Wifi.Sheraton Hamilton HotelAddress: 1264 116 King Street West, Hamilton Telephone: 414-8200The number of rooms: 180 Single room: $30 Double room: $50Special attractions: air-conditioned rooms, Japanese and Chinese restaurants, swimming pool, large garden, free Wifi.【1】If you book a room ahead in Best Western Hamilton, you will call a ________.A.414-5620B.414-6433C.414-6446D.414-8200【2】Where is Comfort Inn Hamilton located?A.At 210 Main Street East.B.At 1264 116 King Street West.C.At 1500 Stone Church Road West.D.At 1530 Stone Church Road East【3】Which of the following will you choose if you want to enjoy Chinese food?A.Best Western Hamilton.B.1530 Stone Church Road East.C.Comfort Inn HamiltonD.Sheraton Hamilton Hotel.【4】Where can we see this passage?A.In a novel.B.In a news report.C.In a science magazine.D.In an advertisement