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【简答题】
算法效率的度量可以分为事先估算法和()。
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举一反三
【单选题】John has caught a bad cold. _______
A.
It’s too bad
B.
I don’t mention it
C.
I’m sorry to hear that
D.
Take it easy
【简答题】图示回路，溢流阀的调整压力为5MPa，顺序阀的调整压力为3MPa，问下列情况时A、B点的压力各为多少？ 液压缸活塞杆伸出时，负载压力P L =1MPa时；
【单选题】Faced with a bill for $10, 000, __________.
A.
John has taken an extra job
B.
the boss has given john an extra job
C.
an extra job has been taken
D.
an extra job has been given to John
【单选题】With his hard work, John ____ the basic knowledge of computer.A. has caught B. has acquired C. has required D. has acknowledged
A.
has caught
B.
has acquired
C.
has required
D.
has acknowledged
【单选题】John caught a cold on Saturday and ______ in bed ever since. [ ]
A.
was
B.
has been
C.
is
D.
have been
【简答题】John has never been on time, ______? A) has John B) hasn't John C) has he D) hasn't he
【单选题】Little John caught a (n)______fish this morning.
A.
alive
B.
alone
C.
lonely
D.
living
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