嚼吸式口器
参考答案：
蜂类特有，上颚发达，可咀嚼固体的花粉，下颚和下唇变长，吸食花蜜时合成喙，中唇舌内有唾液道，中唇舌与食道之间形成食物道。
（）that kind of weather persist, it would be very likely that the two vessels would touch each other.
A.If
B.Would
C.Shall
D.Should
所有真核生物的基因都要经过成熟和剪接过程，才能翻译成蛋白质。 ( )
