【简答题】普通蓄水池一般是用()修建的具有防渗作用,用于()径路的蓄水设施,主要用于()或兼作人畜饮水用。按其结构、作用不同,一般可分为两大类型,即()类型。
【简答题】阅读短文,选择正确的答案。 I'm Amy. I have a new schoolbag. It's black and white. I have many books in it. An English book, a Chinese book, a math book, a notebook and two story-books. I have a pencil-case, too. T...
【单选题】主要起调节水量作用,集水池容积应根据进水管的设计流量、水泵抽升能力、水泵启动方式、启动时间、开停次数、池的水力条件以及进泵站前的下水道是否可能作为调蓄容积而定的是( )。
【简答题】________________由蒸馏水和纯硫酸按一定比例配制而成,主要作用是参与电化学反应,是铅酸蓄电池的活性物质之一。
【简答题】闸坝的主要作用是蓄水和排水,()与水池、()同时设计,结合为一体。
【简答题】听问句,选择正确的答语。 ( ) 1. A. Her name is Jenny. ( ) 2. A. My hair is black. ( ) 3. A. I have three pens. ( ) 4. A. It's under the desk. ( ) 5. A. His favourite colour is red. B. His name...
【单选题】Tom, Bill and Dave lost their backpacks( 背包 ). They are at the Lost and Found desk. The backpacks are the same, but the things in them are d i fferent. Can you help them find the right backpack? Tom: ...