问题
选择题
All the cash crop _____ before we placed an order.[ ]
A. is exported
B. has been exported
C. will be exported
D. had been exported
答案
答案：D
搜题请搜索小程序“爱下问搜题”
All the cash crop _____ before we placed an order.[ ]
A. is exported
B. has been exported
C. will be exported
D. had been exported
答案：D
| 35．Applications put computers to pratical business (1) , but below the (2) it’s the heart of an operating system—the kernel that provides the technical wizardry to juggle multiple program, connect to networks and store (3) . A traditional kernal provides all the functions for applications. The kemal (4) memory, I/O devices and parcels out processor time. The kernel also supports security and fault (5) , which is the ablity to recover automatically when parts of the system fail. |
(3)
A．browser
B．repeater
C．router
D．server