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【单选题】
下列说法中正确的是（ ）A.
x 2 y的系数不是0
B.
0℃表示没有温度
C.
5不是单项式
D.
0不是整数
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反馈参考答案：
举一反三
【单选题】听力原文：W: Oh, Johnson, I want to talk to you. M: Hi, Jenny. What's up? W: I have this great job to manage a clothing store at the mall. M: So what's the problem? W: Well, one of my colleagues in my depa...
A.
She wants to share the good news with him.
B.
She wants to get some advice from him.
C.
She wants him to understand the matter.
D.
She is showing off.
【单选题】在U/C矩阵中，检验每个数据类列必须有一个C且至少有一个U，每个功能行必须有C或U的过程是（ ）[1分]
A.
完备性检验
B.
一致性检验
C.
无冗余性检验
D.
安全性检验
【简答题】When did the war break out between America colonies and England?The war broke out in ______.
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