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【简答题】

Toy Christmas Tree keeps on going. Watch the video film and answer the questions.1).What catches the eye of passerby? A __tree made of __---hundreds of them.2)What did the local Arts and Humanities Council do early this year? The group put out a __to artists early this year to come up with a__ for a non-__Christmas tree.3).Why does Unnasch say constructing the tree is a challenging process?
Because the biggest__ was actually the__. He tried to cover a huge__ shape, a three-dimensional cone shape, so he had to make sure his math was __.4).What did Laurie Yankowski like most about the tree? What she likes most about the tree is how it__the spirit of [填空11]. At the[填空12] of the holidays, all of the[填空13] will be[填空14] to less fortunate families.

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【多选题】牙周膜内注射麻醉的操作方法是()

A.
麻醉针头斜面对着牙龈刺入牙周间隙
B.
为减轻患者不适,注射时针头不应有阻力感
C.
可对麻醉效果不佳的牙根多次注射
D.
对多根牙每一牙根都应进行注射
E.
每个牙根可注入麻醉剂0.2ml

【多选题】下颌第二磨牙阻滞麻醉效果不佳时,常用的补充麻醉方法是()

A.
局部浸润麻醉
B.
骨膜上浸润麻醉
C.
牙周膜内注射麻醉
D.
髓腔内注射麻醉
E.
骨内注射麻醉