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【单选题】
DR的核心是( )A.
X射线球管
B.
平板探测器
C.
检查床
D.
计算机
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反馈参考答案：
举一反三
【简答题】What are the reasons for the students language deficit according to the author?
【简答题】language deficit
【单选题】Who should be blamed for the language deficit?
A.
Students
B.
Student's family and friends
C.
Schools.
D.
Grocery stores.
【多选题】What are the reasons for students' language deficit?
A.
Students are not stupid. However, they mistakenly learn whatever they see and hear in their language environment.
B.
Schools fail to establish high standards of English language abilities.
C.
Schools are unable to sufficiently teach the basic concepts of language-grammar and vocabulary.
D.
Young teachers know little about these important structures of language since they also didn't have the chance to deal with them in their prior learning experience.
【多选题】Who should be blamed for students’ language deficit?
A.
Schools.
B.
Environment.
C.
Teachers.
D.
Students themselves.
【简答题】非对称式加密算法,也叫 加密算法,需要两个密钥: 和 。
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