秦朝秘书官吏的来源有()。
A.从开国功臣中选用
B.辟除
C.从六国旧部中招用
D.运用试吏法简选
E.学校培养、输送
参考答案:A, C, D
Book One is __________ than Book Two. Do you think so? [ ]
A. more easier
B. much easier
C. much easy
D. very easier
10dBm+10dBm=()dBm。
A.13
B.15
C.18
D.20