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【单选题】
点作曲线运动时 , 下述说法正确的是
A.
若切向加速度为正时,则点作加速运动
B.
若切向加速度与速度符号相同,则点作加速运动
C.
若切向加速度与速度符号相反,则点作加速运动
D.
若切向加速度为零,则速度为常矢量
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举一反三
【单选题】From this passage, we learn that people______.
A.
spent more money than they earned
B.
saved more money than previously
C.
invested and consumed at an accelerated pace
D.
spent their money wisely
【单选题】听力原文:M Here is the finance report you requested. Overall, we spent 7% more than last quarter. Fortunately, the increase in revenue made up for it. W That's good. We've done really well so far this yea...
A.
The increase in expenses
B.
The decrease in revenue
C.
This quarter's slow sales
D.
A rival company's performance
【单选题】听力原文:M: When did you last go to the seaside? W: Last July. We spent all our days on the beach. M: Did you have a good time there? W: Yes. We swam and dived off the rocks into the sea. We also played g...
A.
Last June.
B.
Last July.
C.
Last month.
【单选题】实体填充区域不能表示为以下哪项?
A.
图案填充(使用实体填充图案)
B.
三维实体
C.
渐变填充
D.
宽多段线或圆环
【单选题】Guilin is famous its beautiful scenery.
A.
as
B.
for
C.
because
D.
to
【单选题】下列叙述中,正确的一条是()。
A.
分时系统中,时间片越小,响应时间越长
B.
多道程序的引入,主要是为了提高 CPU及其它资源的利用率
C.
飞机票机票系统是分时系统
D.
PCB是进程存在的唯一标志,而程序是系统感知进程存在的唯一实体
【单选题】Guilin is famous ____ its beautiful hills and rivers, while Kunming is famous ____ the Spring City.
A.
for; for
B.
as; as
C.
as; for
D.
for; as
【单选题】Guilin is famous its beattiful scenery.
A.
of
B.
for
C.
as
D.
from
【单选题】地球地壳的六大板块分别是
A.
太平洋板块、欧亚板块、非洲板块、澳洲板块、美洲板块和南极洲板块
B.
喜玛拉雅板快、印度板块、非洲板块、澳洲板块、美洲及南极洲板块
C.
太平洋板块、欧亚板块、非洲板块、澳洲板块、大西洋及南极洲板块
D.
大西洋板块、印度板块、非洲板块、澳洲板块、美洲及南极洲板块
【单选题】在下列叙述中,正确的是( )。
A.
分时系统中,时间片越小,响应时间越长
B.
多道程序的引入,主要是为了提高CPU及其它资源的利用率
C.
飞机票订票系统是分时系统
D.
PCB是进程存在的唯一标识,而程序是系统感知进程存在的唯一实体
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