让实验动物小白鼠吸入混有18O2的空气,该小白鼠体内最先出现含18O的化合物是()A、CO2B、H2OC、C2H5OHD、C3H4O3
让实验动物小白鼠吸入混有18O2的空气,该小白鼠体内最先出现含18O的化合物是()
- A、CO2
- B、H2O
- C、C2H5OH
- D、C3H4O3
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