汽温调节方式?
参考答案:
(1)主汽温采用喷水调节;
(2)再热气温正常运行采用烟气挡板调节;
(3)事故情况下采用事故喷水。
It __________ Tom that parked the car here, as he is the only one with a car.
A.may be
B.might have been
C.must have been
D.could be
按照词法结构类型,语言可以分为()、()、()和()。