【单选题】1-8岁儿童心肺复苏时,胸外按压的深度为( )厘米。
【判断题】配制有抗渗要求的混凝土时,不宜使用矿渣硅酸盐水泥。
【单选题】配制有抗渗要求的混凝土时,不宜使用()。
【单选题】配制有抗渗要求的混凝土时,不宜使用( )
【单选题】—Good morning! I'm Jim White, your new English teacher. —Good morning! _____ .
【单选题】配制有抗渗要求的混凝土时,不宜使用( )。
D.
火山灰水泥 提示:因为矿渣水泥的保水性差,泌水通道较多,干缩较大,这些性质都容易造成混凝土抗渗性差。
【单选题】The boss sent Mr. White to China on business because ______.
A.
Mr. White had never been to China before
B.
Mr. White was an able and hardworking man
C.
Mr. White could buy something interesting for Dick
【简答题】Look, this is a photo of Mr. White’s family. The man in the photo is Mr. White, the father. The woman is the mother. They have two daughters. The girl behind Mr. White is Mary. She’s 14. The girl behi...
【单选题】That's Bob White. We can call him ______. [ ]