通常所说的我国的四大名石是指：寿山石、青田石、（）和巴林鸡血石。
A.昌化鸡血石
B.昌化菊花石
C.丹增玉石
参考答案：A
— Why is he feeling down today?
— Because the suggestion he________has been turned down. [ ]
A. put away
B. put up
C. put down
D. put forward
灭菌
