在有主辅料的情况下，配菜要（）主料的地位和作用。
A.表现
B.展现
C.突出
D.反映
参考答案：C
One third of the students______ Young Pioneers, and the number of this_____ not change much in our class this term. [ ]
A. is, do
B. are, does
C. was, are
D. were, were
炸药的机械感度
