In many parts of the world the only _______ water supply lies below the ground．
A: continuous
B: permanent
C: instant
D: constant
A: continuous
B: permanent
C: instant
D: constant
举一反三
- U4T106. liquefied natural gas from other parts of the world will be ______ up to supply Europe.
- 中国大学MOOC: People in some parts of the world often take their water for ____ . They use as much water as they wish.
- Mini-talk Two 13() A: It can find small changes below ground before the earthquake. B: The devices are placed much deeper below ground. C: The new electrical devices are highly sensitive. D: It can help find the earthquake-prone area.
- Many people ______________ their seemingly endless supply of safe, clean water for daily needs.
- Water treatment process for unpolluted surface water contains: influent, coagulation, ______ , ______ , disinfection, water supply network. (only one word for each blank)