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【单选题】
某烃只能生成一种一氯代物,此烷烃的分子式可能是下列选项中的哪个?( )
A.
CH 4
B.
C 3 H 8
C.
C 4 H 10
D.
C 5 H 12
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参考答案:
举一反三
【单选题】Look, the clock _____ a panda. [     ]
A.
looks at
B.
looks for
C.
looks like
【单选题】当金属烤瓷冠的金属基底太薄时,不会发生的情况是
A.
容易引起崩瓷
B.
会降低金瓷界面的热稳定性
C.
瓷层会引起金属基底变形
D.
会引起金瓷冠颈部不密合
E.
会使基牙出现冷热酸痛和不适
【单选题】Li Lei often takes care of the old woman after school.
A.
looks like
B.
looks for
C.
looks up
D.
looks after
【单选题】当金属烤瓷冠的金属基底太薄时,不会发生的情况是
A.
容易引起崩瓷
B.
会使基牙出现冷热酸痛和不适
C.
瓷层会引起金属基底变形
D.
会引起金瓷冠颈部不密合
【单选题】Tom ________ his father and his father________ young.
A.
looks like, looks like
B.
looks like, looks
C.
looks, looks like
D.
looks, looks
【简答题】罹患率适用于 ( )
【多选题】两台路由器 MSR-1、MSR-2 通过RIP 完成路由的动态学习,在 MSR-1 上看到如下 debug 信息: *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG: RIP 1 : Sending v2 request on Serial 0/0 from 3.3.3.3 *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG: ...
A.
此时在 MSR-1 路由表中还没有来自 MSR-2 的 RIP 路由信息
B.
有可能此时两台路由器的 RIP 刚刚启动
C.
此时在 MSR-1 路由表中已经有来自 MSR-2 的 RIP 路由信息
D.
两台路由器之间的RIP 版本不一致
【单选题】Tom _____ his father and his father _____ very young. [     ]
A.
looks like; looks like
B.
looks like; looks
C.
 looks; looks  like
D.
looks; looks
【简答题】V isitors ______________(request) not to touch the exhibits.
【单选题】Before the meeting he ______ the reports.
A.
looks around
B.
looks to
C.
looks through
D.
looks after
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