— Are these _____________ books?
— Yes, they are my books.[ ]
A. your
B. I
C. you
答案:A
The football player reacted______the judge’s decision by withdrawing from the match.
A on B. to C. against D. by
紫外-可见分光光度法可测定()。
A.指示剂的pH值
B.有色配位化合物的配位数
C.配位化合物的配位键能
D.共价键能