皮皮学，免费搜题
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搜题
【单选题】
肾炎性水肿早期常发生于A.
眼睑与颜面
B.
肩部
C.
背部
D.
骶尾部
E.
下肢
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皮皮学刷刷变学霸
举一反三
【单选题】The Japanese guests suggested ____ their country.
A.
our visiting
B.
to us a visit to
C.
we pay a visit to
D.
all the above
【简答题】已知某离散线性时不变系统的差分方程为2y(n)-3y(n-1)+y(n-2)=x(n-1)，且x(n)=2 n u(n)，y(0)=1，y(1)=1，求n≥0时的输出y(n)。
【单选题】Our teacher recommended that we ______ as attentive as possible when we visit the chapel.
A.
are
B.
shall be
C.
be
D.
were
【单选题】Since our stay was too short,we couldn't visit all the places ________.
A.
where we should like to visit
B.
which we would like to visit them
C.
where we should have liked to
D.
which we would have liked to
【单选题】We____the Expo Park in Shanghai this summer vacation. [ ]
A.
visit
B.
visited
C.
will visit
D.
have visited
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