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【简答题】
电子邮件的基本原理是在通信网上设立“电子信箱系统”,它实际上是一个______。
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反馈参考答案：
举一反三
【判断题】Limited exposure to UVB reduces the skin’s ability to synthesize vitamin D.
A.
正确
B.
错误
【判断题】Limited exposure to UVB reduces the skin’s ability to synthesize vitamin D.
A.
正确
B.
错误
【简答题】Rockets were first used in war in ______ .
【简答题】The ancient Egyptians are supposed ________ rockets to the moon. A) to send B) to be sending C) to have sent D) to have been sending
【简答题】People tend to ignore the delayed effects of exposure to chemical because ________. A) limited exposure to them does little harm to people’s health B) the present is more important for them than the f...
【单选题】Which of the following statements are TURE of limited liability companies?1 The company’s exposure to debts and liability is limited.2 Financial statements must be produced.3 A company continues to ex...
A.
1 and 2 only
B.
1 and 3 only
C.
2 and 3 only
D.
1, 2 and 3
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