当原煤中粗粒级质量好，细粒级质量差时，一般应加强透筛，增加吸啜力。对风阀的调整采取进气时间短，排气时间长，风量大，水量小的原则。
参考答案：对
____________in his school that many of his fans want to get close to him.
A．So is he popular
B．So popular is he
C．So popular he is
D．So he is popular
简述FTTH故障处理常用方法。
