某同学在解剖的家鸽气管中插入玻璃管并向管中吹气,最明显的变化是[ ] A.气管膨

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问题:

某同学在解剖的家鸽气管中插入玻璃管并向管中吹气,最明显的变化是[ ]

A.气管膨胀

B.气囊膨胀

C.两翼举起

D.嗉囊膨胀

考点:动物的形态结构和功能
题型:选择题

请你根据你自己的实际情况回答下列问题。

1. When are you going to get up tomorrow morning?    

                                                                            

2. What are you going to do tonight?  

                                                                            

3. Where are you going to play sports tomorrow?    

                                                                            

4. Are you going to clean your room this weekend?     

                                                                            

5. Is your mother going shopping this Sunday? 

                                                                            

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图中的A是一边长为L的正方形导线框,其电阻为R。现维持线框以恒定的速度v沿x轴运动,并穿过图中所示的匀强磁场区域B。如果以x轴的正方向作为力的正方向,线框在图示位置的时刻作为时间的零点,则磁场对线框的作用力F随时间t的变化图线应为哪个图?(  )

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TAC的作用是用于UE的()?

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How does an icebreaker normally free a ship which has become beset while navigating independently?()

A.By backing down the track and cutting out ice on either bow

B.By approaching from the stern and crossing ahead at an angle of 20° to 30° to the beset ship's course

C.By overtaking the beset ship,running ahead and then backing down the track to the beset vessel

D.By approaching the vessel from astern and towing the beset vessel stern first

题型:选择题

社交场合的接触会传播艾滋病吗?

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