多发性骨髓瘤的临床症状有()
A.贫血
B.容易骨折
C.血片上有缗钱状红细胞
D.血沉加快
E.骨髓片上见到骨髓瘤细胞
参考答案：A, B
Charles Babbage is generally considered ________ the first computer.
A．to invent
B．inventing
C．to have invented
D．having invented
微软系统更新补丁服务器的简称是（）？
A.WSSU
B.VBS
C.WSUS
D.LUA
