A．Because their environment is becoming more and more dirty.B．Because the traditional

A．Because their environment is becoming more and more dirty.

B．Because the traditional ways of treating wastes are not efficient.

C．Because they are short of useful materials.

D．Because they need new materials made from garbage.

您可能感兴趣的试题

The reason why children learn their mother tongue so well lies solely in their environment

答案解析
A．Because more people are living beyond their expectations.B．Because scientists are ve

答案解析
A．They might lose control of their members because of the increase in immigration.B．Th

答案解析
Language: Is It Always Spoken？ 1 Most of us know a little about how babies learn to talk. From the time infants are born , they hear language because their parents talk to them all the time. Between

答案解析
The NVC is important for managers because they have to______.A．understand what their staff

答案解析
Why are some baby milk company accused？A．Because their products are not registered.B．Becau

答案解析
Why workers want more money？A．Because their jobs are too boring.B．In order to enjoy more t

答案解析