采用等离子点火燃烧器，点火和稳燃与传统的燃油相比有几个优点（）、环保、（）、简单。
参考答案：经济；高效
在高空飞行的子弹具有______能，______能，还具有______能，子弹落地后这三种能不为零的是______能．
A．He may convert it and use it as a restaurant.
B．He may pull it down and build a new restaurant.
C．He may rent it out for use as a restaurant.
D．He may sell it to the owner of a restaurant.
