A:NH4OH2
B:NH4NO2
C:CH3COONH4
D:NH4NO3
—Hi, Bob! Can you tell me ______?
—Sure. The No.5 bus will take you there.
生物圈中的消费者是:( )
我们学了五种地形,除了平原还有如图四种,它们的名称依次是( )
--“ I wonder if you’d mind us asking a few questions.”
--“ Not at all. ______.”