题目内容

岩石骨架颗粒越不规则,岩石的比面越小。

A. 对
B. 错

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岩石的比面越大,孔隙表面越多,可以吸附的化学药剂就越多,直接影响化学方法采油的药剂吸附量。

A. 对
B. 错

_______youarefree,willyoucomeskatingwithus?

A. Becauseof
B. Since
C. Though
D. although

Henryshouldgotothelibrarynextweekto_______thosebooks.

A. replace
B. alter
C. return
D. publish

Thereare________dressmakersintheUSthaninEuropeancountries.

A. farfewer
B. sofewer
C. asfewer
D. toofewer

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