问题
选择题
He failed in the exam, and I wonder ___ he studied hard in the school.
A．when
B．that
C．if
D．where
答案
答案：C
本题failed是关键词，C项符合题意，意为：是否。
搜题请搜索小程序“爱下问搜题”
He failed in the exam, and I wonder ___ he studied hard in the school.
A．when
B．that
C．if
D．where
答案：C
本题failed是关键词，C项符合题意，意为：是否。
填写路由器RG中相关的路由表项
| 目的网络/掩码长度 | 输出端口 |
| ______ | S0(直接连接) |
| ______ | S1(直接连接) |
| ______ | S0 |
| ______ | S1 |
| ______ | S0 |
| ______ | S1 |
