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【单选题】
计算机把通过检测装置和A/D转换器送来的数字信号直接反馈到输入端与( )值进行比较,将偏差按某种控制算法进行计算,输出信号经D/A转换后驱动执行机构对被控对象进行调节。
A.
输入
B.
反馈
C.
给定
D.
输出
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参考答案:
举一反三
【简答题】(Short-answer Question) What is a register? What is the storage capacity of a register that can retain one byte of data? What does the “shift capacity” of a register mean?
【简答题】What is the main storage device in most computer systems?
【单选题】美国联邦国民抵押协会俗称()。
A.
房利美
B.
吉利美
C.
房美美
D.
房地美
【单选题】In a 32-bit computer system, if the first address of an int-type array array[n] is A, then what is the storage address of array[2]
A.
A + 2
B.
A + 4
C.
A + 8
D.
A + 12
【单选题】Many unnecessary items went by the wayside in the storage room. What is the meaning of the underlined words?
A.
to walk on one side of the way
B.
to be discarded
C.
to be put in the center
D.
to be treasured
【单选题】In a 32-bit computer system, if the first address of a short int array[n] is A, what is the storage address of array[2]
A.
A + 2
B.
A + 4
C.
A + 8
D.
A + 12
【单选题】妊娠合并病毒性肝炎的产妇在产前4小时至产后12小时内不宜应用
A.
维生素
B.
降氨药物
C.
降压药物
D.
肝素
【单选题】Many unnecessary items went by the way side in the storage room. What is the meaning of the underlined words?
A.
to walk on one side of the way
B.
to be discarded(被抛弃)
C.
to be put in the center
D.
to be treasured
【单选题】What is pumped storage?
A.
Extracting electricity many times from the same water by constructing a series of dams along the water course
B.
Using a pump to increase water pressure when the head is low
C.
A way of releasing water from a reservoir to maintain the maximum possible head
D.
A mechanism for storing electricity by running a hydro scheme in reverse
【简答题】在古代,促进商业产生和发展最重要的两大因素是( )和自然环境。
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