题目内容
（请给出正确答案）
[主观题]
How many marriages in the U.S. are between blacks and whites？A．2 million.B．5%.C．2.5%.D．Hal
How many marriages in the U.S. are between blacks and whites？
A．2 million.
B．5%.
C．2.5%.
D．Half a million.
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电子邮件到达时，如果接收方没有开机，那么邮件将______。
A) 开机时重新发送 B) 丢失
C) 退回给发件人 D) 保存在服务商的E-mail服务器上
