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【多选题】
小肠与大肠的共同结构特征是A.
上皮均为单层柱状上皮
B.
上皮中均含有杯状细胞
C.
固有层均含有腺体
D.
腔面均有皱襞和绒毛
E.
固有层的腺体均含有杯状细胞
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皮皮学刷刷变学霸
举一反三
【单选题】The reason why the laser beam is very strong is that ______.
A.
it is artificially illuminated (照亮)
B.
it is made up of a concentrated beam of light
C.
it sends out heat in all directions
D.
its heat is increased by the heat of the sun
【简答题】Down综合征
【简答题】Down综合征
【单选题】A composite restoration is wider than the diameter of the light tip of the curing unit．In this situation，the restoration is cured by( )
A.
moving the tip over the surface for the required time
B.
placing the tip stepwise over each area and exposing each area for the required time
C.
positioning the tip far enough from the surface to illuminat
D.
the entire surface
【简答题】// 写法一 function m1({x = 0, y = 0} = {}) { return [x, y]; } // 写法二 function m2({x, y} = { x: 0, y: 0 }) { return [x, y]; } 请问两个方法的执行结果是否一样?
【简答题】Down综合征
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