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【单选题】
下列关于批处理系统的叙述中,正确的是( ) I、批处理系统允许多个用户与计算机直接交互 II、批处理系统分为单道批处理系统和多道批处理系统 III、中断技术使得多道批处理系统和 I/O 设备可与 CPU 并行工作A.
仅 II、III
B.
仅 II
C.
仅 I、II
D.
仅 I、III
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反馈参考答案：
举一反三
【单选题】I have no idea what ____ while I was asleep.
A.
has happened
B.
was happened
C.
had happened
D.
happened
【单选题】—_____ did your play soccer? —For three years. [ ]
A.
How often
B.
How many
C.
How much
D.
How long
【多选题】下列哪些因素的调节,结束了子宫的抑制状态,引起于宫的收缩. 母畜分娩发动开始。
A.
雌激素
B.
孕酮
C.
催产素
D.
前列腺素
E.
促卵泡素
F.
神经因素
G.
机械作用
【单选题】I have no idea what _____ while I was asleep.
A.
has happened
B.
could happen
C.
had happened
D.
happened
【单选题】I have no idea what ( )while I was asleep.
A.
has happened
B.
was happened
C.
had happened
D.
is happened
【单选题】I have no idea what Linda ______ at this time tomorrow.
A.
will be doing
B.
is doing
C.
will do
D.
does
【单选题】How much instruction did the man have before going out on the river?
A.
Three hours.
B.
Three complete days.
C.
Three classes.
D.
Three weeks.
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