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【单选题】
1937年11月至l941年12月，上海这段时间的文学发展在历史上被称为（ ）。A.
“孤岛文学”
B.
国统区文学
C.
沦陷区文学
D.
红色文学
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举一反三
【简答题】GB17930-1999中规定90号车用汽油的（）应≤0.005g/L。
【简答题】He into the office building when the fire bell rang.
【单选题】The texture of a building is more interesting when _____.
A.
the building is made from many different materials
B.
the pattern on a building is very large
C.
the same pattern repeats all over the building
D.
there is some variation of patterns on the building
【简答题】If the K-L integral Equation 10.5-3 has two solutions, φ 1 (t) and φ 2 (t) corresponding to the eigenvalues λ 1 and λ 2 , then show that if λ 1 ≠0 and λ 2 ≠λ 1 we must have (Hint: Substitute for φ 1 (...
【简答题】GB17930-1999无铅车用汽油中规定90号无铅车用汽油的（）应不小于480min。
【单选题】( ) is often done in a particular way when the building fails, or when the damage is suddenly noticed.
A.
Building maintenance
B.
Building repair
C.
Building protection
D.
Building enclosure
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