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【判断题】
纯净的、不含杂质的绿柱石品种是无色的,当含有杂质元素时呈现出各种颜色。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】At prices ($4, $12), Harry chooses the bundle (9, 4). At the prices ($8, $4), Harry chooses the bundle (2, 9). Is this behavior consistent with the weak axiom of revealed preference?
A.
Yes
B.
No
C.
It depends on his income
D.
We would have to observe a third choice to be able to say
【简答题】听下面一段材料，回答第1-3题。 1. What is the possible relationship between the two speakers? A. Workmates. B. Husband and wife. C. Neighbours. 2. What do we learn about Mary? A. She wants to set up a web design c...
【多选题】32 以下哪些是JSP的内置对象
A.
out,page,request
B.
response,session,application
C.
config,pageContext,exception
D.
page,include,taglib
【单选题】执行以下程序段后输出结果是：main(){ int y=10; do{y--;}while(--y); printf("%d\n",y--);}
A.
-1
B.
1
C.
8
D.
0
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