消烟的关键是使煤燃烧充分,不生成一氧化碳和()。
A.飞灰
B.SO2
C.NO
D.炭黑
参考答案:D
—What size pizza would you like?
— .[ ]
A. No, thanks
B. Yes, please
C. Large one, please
D. With a mushroom and cheese
不属于正常的舌象是()
A.舌体柔软
B.苔质干湿适中
C.舌质淡嫩少苔
D.舌质淡红
E.舌苔薄白