【单选题】隧道洞口位置应选择在 ..................................................................... ○
【判断题】用IUPAC系统命名法命名化合物 是1-环己基-1-甲醇;
【单选题】湿地一词最早在 ............................................................( )
【单选题】I’m sorry that I ( ) you had been there already.
【单选题】大批量连续数据进行传输时,常采用()数据交换技术
【单选题】N—S diagram can used to substitute conventional program flow chart. In the following phrases, which does not belong to the basic control structures that contain? ( )