生产者、消费者和分解者是生物群落的三大功能类群。 ( )
参考答案:对
—_____ in summer here?
—It's not very hot. [ ]
A. What's the weather
B. What's that
C. Where's the weather
D. How's the weather
口腔黏膜如有溃疡可酌涂液状石蜡。