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【单选题】
大家爱吃的葵花籽来自于向日葵这种植物．下列叙述正确的是（　　）
A.
向日葵的大花盘是的果实，种子成熟后裸露在外，属于裸子植物
B.
葵花籽是向日葵的种子，由胚珠发育而来
C.
朵朵葵花向太阳，说明向日葵能对外界光的刺激发生反应
D.
向日葵的种子中含有的有机物的主要成分是脂肪
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PARENTS USUALLY HELP THE M.
B.
THE KIDS ARE GOING TRICK-OR-TREATIN G.
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BUT I DON'T KNOW HOW IT IS CELEBRATE D. D. IF YOU GO, TAKE ME WITH YOU.
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【单选题】下列有关胃肠减压管的护理措施,错误的是:
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观察引流液的量、颜色变化
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保持引流管通畅，防止阻塞
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妥善固定引流管
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按时更换引流瓶
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