题目内容：
词义匹配，学习词汇含义。选项：
A.a single element of data from a collection
B.activities undertaken by a group of people in order to achieve a particular goal or overcome a particular difficulty
C.an action or actions taken to stop somebody from doing something or to stop something from happening
D.the use of physical force to injure somebody or damage something
E.the act of preventing somebody or something from being harmed or damaged, or the state of being kept safe
F.just barely sufficient in quality or quantity to meet a need or qualify for something
G. somebody who has committed a crime
1. effort
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2. prevention
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3. violence
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4. protection
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5. inadequate
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6. criminal
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7. statistic
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