【单选题】钢件发蓝处理可以使工件表面形成()为主的多孔氧化膜。
【单选题】导游员看到道路两边栽种的树木,在向游客介绍树种及特色时,还向游客介绍了我国的植树节。此时导游员运用的讲解方法是( )。
【单选题】景点导游员看到道路两边栽种的树木,在向游客介绍树种及特色时,还向游客介绍了我国的植树节。此时导游员运用的讲解方法是( )。
【单选题】钢件发蓝处理可以使工件表面形成以()为主的多孔氧化膜。
【单选题】听力原文:M: Jennifer, you are late again! W: I'm sorry, but I was caught in a traffic jam on my way to school. Q: Why was the woman late? (9)
B.
Because she got up late.
C.
Because the traffic was very heavy.
D.
Because she took the wrong bus.
【单选题】导游员看到道路两边栽种的树木,在向游客介绍树种及特色时,还向游客介绍了我国的植树节。此时导游员运用的讲解方法是____。
【单选题】— If I hadn’t been caught in the heavy rain, I could have been back by 7 o’clock. — What a pity! Stella _______ here to see you.
【单选题】—I was caught in the heavy rain, so I couldn’t be back by 7 o’clock. —__________! Janna was here to see you.