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【单选题】
连接多个网络或网段的网络设备。有数据通道和控制两大典型功能的网络互联设备是（ ）。A.
中继器
B.
路由器
C.
网关
D.
网桥
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反馈参考答案：
举一反三
【单选题】Small cracks in the crankshaft bearing surface of a diesel engine are an indication of _____
A.
insufficient lubrication
B.
fatigue failure
C.
abnormal wear
D.
corrosion fretting
【单选题】—How did your father smoking?—The doctor told him to do so，and he took the advice.A．give inB．brin
A.
—How did your father____smoking? —The doctor told him to do so，and he took the advice. A．give in
B.
bring in
C.
give up
D.
bring up
【判断题】Water seeping through cracks in surface courses into the underlying layers of pavement is small in volume, and it will not cause much damage to the pavement.
A.
正确
B.
错误
【单选题】Small dents, scratches, cracks, and holes that can be repaired by smoothing, sanding, stop drilling, or hammering out, or otherwise repaired without the use of additional materials, fall in ______.
A.
Negligible damage
B.
Damage repairable by patching
C.
Damage repairable by insertion
D.
Damage Necessitating Replacement of Parts
【简答题】About 300 million years ago, long before dinosaurs ruled the earth, the cockroach already had been here for a long time. We can only guess at why it has not become extinct, but the physical assets of ...
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