异步串行通信的基本特点是：以（）为单位，传输是（）间异步，（）内同步。
参考答案：字符；字符；字符
In the context of the UN Convention on Contracts for the International Sale of Goods, explain the obligations relating to price placed on the buyer. (10 marks)
低效消毒剂是（）
A.0.5%碘伏
B.2%戊二醛
C.两者均是
D.两者均否
