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【单选题】
龈上边缘的缺点是A.
容易造成菌斑附着
B.
边缘不易密合
C.
易产生继发龋
D.
在前牙区不美观
E.
易形成肩台
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反馈参考答案：
举一反三
【单选题】定义一个数组,代码如下: var arr = new Array(9); arr[0]=1; arr[2]=2; 该数组的length属性值为( )。
A.
1
B.
2
C.
9
D.
10
【单选题】I forgot to give my regards to my manger in my letter. I wish I _____ it.
A.
should do
B.
did
C.
have done
D.
had done
【多选题】What message in the following text can be delayed to create suspense? It was my girlfriend’s birthday. Early in the morning I told her that I forgot to prepare her birthday gift and would give it to h...
A.
The identity of my girlfriend
B.
The bus number
C.
The day being her birthday
D.
What gift it was
【单选题】有如下代码: var arr = new Array(9); arr[0]=1; arr[2]=2; 该数组的length属性值为
A.
2
B.
5
C.
7
D.
9
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