为什么耙斗装载机在试车前应发出信号?
参考答案:
在试车前发出信号的目的是警示耙斗装载机前施工人员及时撤出耙斗运行范围,确保施工人员安全。
When the government office building was under fire, the crowd got into panic.
A.不填;a
B.the;不填
C.a;the
D.the;a
汽油辛烷值是衡量其在燃烧使用中生成胶质倾向的指标。