【单选题】【消耗次数：1】
Hes worked here___three years.
①
since
②
in
③
for
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相关题目
【单选题】
—Are you a teacher?—No, but I ________. I worked in a middle school for three years.
①
am
②
will
③
do
④
was
【单选题】
—Are you a teacher?—No, but I ________ once. I worked in a middle school for three years.
①
am
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will
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do
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was
【判断题】
Before he began to study in the university, he had worked in a company for three years.
①
正确
②
错误
【单选题】
Not until three years ago _____ to work outside.
①
he began
②
he begins
③
began he
④
did he begin
【单选题】
he park has been built and it will be open _____ three years
①
A. in
②
B.for
③
C.on
④
D.after
【单选题】
I came to?Beijing?in 1991 and have been ?[填空] here ever since.
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live
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lives
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lived
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living
随机题目
【单选题】
下列关于USB接口的叙述，正确的是_______。
①
从外观上看，USB连接器与PC机并行口连接器差不多
②
USB接口2.0版的数据传输速度肯定要比1.1版快一倍
③
USB能够通过其连接器引脚向外设供电
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USB采用并行方式进行数据传输，以提高数据的传输速度
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对高级语言程序的下列叙述中，正确的是_____。
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计算机语言中，只有机器语言属于低级语言
②
高级语言源程序可以被计算机直接执行
③
C语言属于高级语言
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机器语言与机器硬件是无关的
【多选题】
冯·诺依曼提出的“存储程序工作原理”基本思想是________。
①
事先编好程序
②
将程序存储在计算机中
③
自动将指令从存储位置取出并执行
④
需人工干预执行每条指令