在22℃时,测得纯水中的〔H+〕和〔OH-〕都为()mol∕L。
参考答案:10-7
综合填空。
I'm Jim. I'm a schoolboy. I'm seven. I'm _____(1) Class Two, Grade One. My father is in the jeep. His
name is Colin Smith. Julia is my mother. She _____(2) a round face. I ____(3) a brother and a sister. My
brother is Phillip. He's too small. He's at home. My sister is Maria. She's nine. She's in Class One, Grade Three.
I have a good friend. _____(4) name is Jim Black. We're in the _____(5) class.
承担土建工程试验、检测的()及承担有关结构安全和功能试验、检测的单位应具有相应资质。