题目内容

【C12】

A. accompany
B. enforce
C. execute
D. compel

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A.Chemicals, lumber and cattle.B.Lumber, automobiles and cattle.C.Chemicals, automobil

A. Chemicals, lumber and cattle.
B. Lumber, automobiles and cattle.
Chemicals, automobiles and cattle.
D. Chemicals, lumber and automobiles.

属于壁胸膜形成的结构是E.

【C17】

A. but
B. or
C. and
D. though

【C13】

A. regulate
B. encounter
C. stimulate
D. challenge

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