单项选择题
Which of the following memory types is unique in that it generates so much heat it requires that the memory modules are covered in heat sinks?（）
A.RAMBUS B.DDR3 C.DDR D.SDRAM
单项选择题 Which of the following should be avoided when installing a laser printer?（）
单项选择题 Which of the following is the subnet mask for a Class C IP address?（）
单项选择题 Which of the following is the IPv6 loopback address?（）
