什么是utils工具包

Event类属于下列哪一个程序包? A: awt B: applet C: lang D: utils

下列哪个软件包可以更换服务器根路径到DNS目录()。 A: chroot B: utils C: bind D: libs

Two systems of weights and measures used in the U.S. are ______. A: the U. S. Customary System and the metric system B: the International System and the metric system C: the Imperial System and the metric system D: the Customary System and the Imperial system

Starting system and ignition system belong to the electrical system？

What does the autopilot system include?? Hydraulic system|Mechanical system|Electrical system|All of above

The Atlantic Ocean is ( ). A: a closed system B: an open system C: an isolated system D: a homogeneous system

Engine system includes __________________, starting system, __________________ cooling system, fuel supply system, crank-connection rod mechanism and __________________.

What’s the type of the control system on CFM56-3 engine? ( ) A: pneumatic mechanical system B: EEC system C: FADEC system D: hydro-mechanical system

China's independently developed navigation system is ( ). A: GPS system B: GLONASS system C: Beidou system D: Galileo satellite navigation system