【判断题】1970年美国超级市场AdHoc委员会制定了通用商品代码——UPC码(Universal Product Code),此后许多团体也提出了各种条码符号方案。
【单选题】— Excuse me. Can you spare me a few minutes? — _____. [ ]
【单选题】1970 年,美国超级市场 AdHoc 委员会制定了通用商品代码 代码。
【单选题】生殖细胞包括精子和卵子,发生过程中经过两次减数分裂,均为单倍体细胞,即仅有23条染色体,其中22条是常染色体,1条是性染色体。从卵巢排出的卵子处于
【单选题】1970年,美国超级市场AdHoc委员会制定了通用商品代码()代码
【单选题】―Do you have anything to do this afternoon? ―What’s up? ―Let’s go shopping. It’s said that Jinying Shop _____, and all the sweaters are sold at half price. ―Why not?
【单选题】1970年,美国超级市场AdHoc委员会制定了通用商品代码()代码
【单选题】—You look so worried, what’s wrong? —More and more people like me become to worry about the __________ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
【单选题】-You look so worried, what’s wrong? -More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.