（）即邮件阅读总数与邮件送达总数的比值。 A.邮件送达率 B.邮

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问题单项选择题

（）即邮件阅读总数与邮件送达总数的比值。

A.邮件送达率

B.邮件反馈率

C.引导点进率

D.邮件开信率

答案

参考答案：D

单项选择题

—What did Maria say

— ().

A. Maria said that she likes their uniforms.

B. Maria said that she doesn't like their uniforms.

C. Maria said that she didn't like their uniforms.

D. Maria said that she was like their uniforms.

填空题

生物礁是一种（）建造，造物礁主要是珊瑚藻。