病原物的侵染过程分哪几个时期？

A. /SQL*Plus commands cannot be abbreviated.
B. /SQL*Plus commands are accessed from a browser.
C. /SQL*Plus commands are used to manipulate data in tables.
D. /SQL*Plus commands manipulate table definitions in the database.
E. /SQL*Plus is the Oracle proprietary interface for executing SQL statements.

A. 间接检眼镜的放大倍率约3倍
B. 直接检眼镜的放大倍率约15倍
C. 间接检眼镜观察到的眼底范围要大于直接检眼镜
D. 直接检眼镜检查时所成的视网膜像是直立的正像
E. 间接检眼镜检查患者的眼底像成在检眼透镜和患者之间