敞流浇铸所使用的润滑剂菜籽油的着火点为240~280℃。
参考答案:错
Written in a hurry,(). How can it be satisfactory
A. they found many mistakes in the report
B. Sam made lots of mistakes in the report
C. there are plenty of mistakes in the report
D. the report is full Of mistakes
遇到下列哪种情况时需要把进程移到前台?()
A.进程正在运行一个与用户交互的Activity,它的onResume()方法被调用
B.进程有一正在运行的BroadcastReceiver,它的onReceive()方法正在执行
C.进程有一个Service,该Service对应的Activity正在与用户交互
D.A、B、C选项均正确