皮皮学，免费搜题
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【单选题】
乳香的化学成分分类属于( )。A.
单树脂
B.
胶树脂
C.
油胶树脂
D.
油树脂
E.
香树脂
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知识点：
皮皮学刷刷变学霸
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【简答题】往复泵上为何要设有空气室。
【简答题】Make sure 确保
【简答题】往复泵为何要设空气室？对空气室的使用管理上应特别注意什么问题？往复泵打不上水的原因有哪些？
【单选题】Why did Chanel test her clothes on moving models? a She wanted to make sure they looked good. b She wanted to make sure that models could move around easily. c She wanted to make sure the material was...
A.
a She wanted to make sure they looked good.
B.
b She wanted to make sure that models could move around easily.
C.
c She wanted to make sure the material was strong enough.
【单选题】现场控制是病区护士长常采用的一种控制方法,其主要内容为
A.
向护士指示当班内重点观察的病人
B.
向护士指示如何收集资料
C.
观察护士静脉留置针的操作方法
D.
以上均是
E.
以上均不是
【单选题】They surveyed the area __ the tomb faced south.
A.
make sure
B.
making sure
C.
to make sure
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