【简答题】预应力混凝土结构中,()使用含氯化物的外加剂. A﹒优先 B﹒能够 C﹒宜 D﹒严禁
【单选题】— I posted the letter a week ago. — Then they________the letter by now. It usually takes four days. [ ]
【单选题】()混凝土结构中,严禁使用含氯化物的外加剂。
【单选题】Mr. Wu said he ______ us to the zoo the next week.
【判断题】S7-300系列PLC的程序总是以组织块的形式进行编写与保存的。()
【单选题】Tom bought a bike last week. It _______ him a lot. [ ]
【判断题】《大雷雨》中的守旧派人物形象,主要以季科伊和卡巴诺娃为代表。
【单选题】--I posted the package a week ago.--Then they ______ the package by now. It usually takes 5 days.
C.
ought to have received
【简答题】He takes a shower ________ (one) a week.
【判断题】S7-300 系列PLC的程序总是以组织块的形式进行编写与保存。