更多"why do some stations keep silence?（"的相关试题:
[单项选择]Why not（）and do some outdoor activities?
A. goes out
B. go out
C. to go out
D. going out
[简答题]Why do we say tree diagrams are more advantageous and informative than linear structure in analyzing the constituent relationship among linguistic elements Support your statement with examples?
[多项选择]Why do large OSPF networks use a hierarchical design？（）
A. to confine network instability to single areas of the network
B. to reduce the complexity of router configuration
C. to speed up convergence
D. to lower costs by replacing router swith distribution layer switches
E. to decrease latency by increasing bandwidth
F. to reduce routing overhead
[单项选择]Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?（）
A. The chromium will not wear out the piston rings
B. The chromium strengthens the liners in the way of the scavenging air ports
C. Chromium eliminates the need for oil scraper rings
D. Pores in the plating aid in maintaining the lube oil film
[单项选择]In some parks visitors are requested to keep（）the grass.
A. aside
B. away
C. out
D. off
[多项选择]Why do large OSPF networks use a hierarchical design？（）
A. to confine network instability to single areas of the network.
B. to reduce the complexity of router configuration.
C. to speed up convergence.
D. to lower costs by replacing routers with distribution layer switches.
E. to decrease latency by increasing bandwidth.
F. to reduce routing overhead.
[简答题]why do you configure GRE in IPV6？
[单项选择]Do you need any rice? I can get some（） you（）the supermarket.
A. to；from
B. for；to
C. for；from
[单项选择]Some TV programs are interesting but some others are（）and full of violence.
A. frightening
B. frightened
C. to be frightening
D. to be frightened
[单项选择]In some type of two-stroke engines, besides some small holes for（）, starting valve, safety valve, indicator cock, and central opening in each cylinder cover for mounting the（）
A. fuel valves；exhaust valve
B. exhaust valves；inlet valve
C. fuel valves；inlet valve
D. exhaust valves；fuel valve
[单项选择]For some years after his graduation, he（）some of his classmates, but as times went by, he dropped them one by one
A. caught up with
B. kept in touch with
C. kept up
D. made up with
[单项选择]Keep clear（）the buoy.
A. to
B. on
C. of
D. for
[单项选择]Why（）go swimming there?
A. often do you
B. do you often
C. do often you
[单项选择]Which emergency equipment should you keep near the towing bitts? （）
A. A self-contained breathing apparatus (SCBA)
B. A boat hook and a spanner wrench
C. A fire ax and/or cutting torch
D. A Stokes litter basket
