用含18O的葡萄糖跟踪有氧呼吸过程中的氧原子,18O的转移途径是[ ]
A.葡萄糖→丙酮酸→水
B.葡萄糖→丙酮酸→氧
C.葡萄糖→氧→水
D.葡萄糖→丙酮酸→CO2
答案:D
—How do you like it?
—______. [ ]
A. I like the food
B. I like it very much
C. I like the people
D. I like the drink
石灰石经燃烧放出二氧化碳而生成块状材料,称为( )。
A.熟石灰 B.生石灰C.石灰膏 D.碳酸钙