This pair of glasses cost ________ that she didn't buy them.
A：so expensive
B：so much
C：too much
D：too expensive
康有为《公车上书》中的下列观点能够体现戊戌变法主要特征的是（ ）
14－6=____
13－8=____
4＋8=____
13－9=____
15－7=____
12－6=____
9＋3=____
17－9=____
11－7=____
