【单选题】According to the passage, we can avoid a worldwide water shortage in the future, by
B.
musing water and utilizing sea-water.
C.
cutting down our consumption of water.
D.
reducing the number of factories producing steel.
【简答题】PLC 的三种输出方式是 (________) 输出、 (________) 输出、晶闸管输出
【单选题】婴儿腹泻,中度脱水,失水量约为体重的:()
【判断题】在PLC的三种输出方式中,工作频率最快的是继电器输出。
【判断题】在PLC的三种输出方式中,工作频率最快的是继电器输出。 ( )
【单选题】婴儿腹泻,中度脱水,失水量约为体重的( )
【单选题】婴儿腹泻,中度脱水,失水量约为体重的:( )
【单选题】To avoid worldwide water shortage in the future, the author suggests that we can ______.
B.
develop ways of reusing water
C.
cut down the number of large cities
D.
reduce the number of factories, which use large amount of water
【单选题】为获得稳定的葡萄酒的质量,在酿造葡萄酒的时候唯一可以添加的是()。