Which statements about Java code security are true？（） A、 The bytecode verifier loads all classes needed for the execution of a program.B、 Executing code is performed by the runtime interpreter.C、 At runtime the bytecodes are loaded， checked and run in an interpreter.D、 The class loader adds security by separating the namespaces for the classes of the local file system from those imported from network sources.
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备用电源系统（ABEX,HMG,SEP)向什么汇流条供电？A、Essential DC bus(Using the TRU)B、Essential AC bus(Using the E-inverter)C、Essential DC bus(Using the TRU)和Essential AC bus(Using the E-inverter)D、Essential DC bus(Using the E-inverter)和Essential AC bus(Using the TRU)
You have a computer that runs Windows XP Professional. You download new video card driver from the Internet, and then install the driver. You restart the computer. You discover that the newly loaded video driver is named VgaSave. You need to restore the previous version of the video card driver.What should you do?（） A、From the Device Manger, scan for hardware changes. B、From the Device Manager, access the video card properties, and then select Roll Back. C、From the Device Manager, access the VgaSave properties, and then run the Hardware Troubleshooter. D、Restart the computer. From the Advanced Startup Options menu, select Last Known Good Configuration.
Your computer runs Microsoft Windows XP Professional. You share your computer with two other co-workers. You purchase a new computer. You install Microsoft Windows Vista on the new computer. You need to migrate the following content from the old computer to the new computer： All system and program settings All users settings Only the content in the C:///Appdata folder Which tool should you use？ （）A、File and Settings Transfer wizardB、Application Compatibility toolkitC、Windows Automated Installation toolkitD、Microsoft Windows Easy Transfer wizard
风档使用什么电源加温？A、左右ACB、左右DCC、左右ESSENTIAL AC BUSD、左右ESSENTIAL DC BUS
E－inverter向哪个汇流条供电？A、Essential AC busB、Essential DC busC、Essential AC bus&Essential DC busD、左，右主交流汇流条
单选题According to the Code of Federal Regulations，on vessels other than river ferryboats and river vessels，how are periodic lifeboat weight tests required to be conducted?（）A The lifeboat is lowered to near the water，loaded with the allowed capacity，lowered into the water until afloat，then released from the fallsB The lifeboat is loaded with the allowed capacity，lowered into the water until afloat，then released from the fallsC The lifeboat is lowered into the water until afloat，loaded with the allowed capacity，then released from the fallsD The lifeboat is lowered to near the water，loaded with the allowed capacity，then released from the falls
