YJ29滤嘴接装机调整胶后加热器导向板前,不必将胶后加热器锁固在其工作位置。
参考答案:错
. No one knows how large universe is, but man has never given up the attempt to explore new stars and new planets.
A.the;/
B./; the
C./:/
D.the; the
为了保证提升系统安全可靠运转,《煤矿安全规程》有关条例对提升信号,作了哪些详细的规定?