让小白鼠吸入放射性的18O2,该小白鼠体内最先出现含18O的细胞结构和化合物是()
A:细胞质基质和CO2
B:线粒体和H2O
C:细胞质基质和丙酮酸
D:线粒体和乳酸
—________. The beaches there are very beautiful and we also enjoyed some fresh seafood.