将若干个预热器单体并联起来时,会()。
A、增加气体的预热量
B、空气侧的阻力增大
C、可以构成大型预热器
参考答案:A, C
Look! Every player in our team is doing their best. It seems our team is going to win.
A.even if
B.if only
C.as if
D.only if
GSM手机的实时时钟频率一般为()kHz。
A、32.768;
B、327.68;
C、3276.8;
D、32768。