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【简答题】
某岩石的密度为 2. 75g/cm 3 ,孔隙率为 1.5 。今将该岩石破碎为碎石,测得碎石的堆积密度为 1560kg/m 3 。试求此岩石的表观密度和碎石的空隙率。
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举一反三
【单选题】Daniel goes to the computer Club _____. [ ]
A.
every Tuesday and Thursday afternoon
B.
on every Tuesday and Thursday afternoon
C.
in Tuesday and Thursday afternoon
D.
at Tuesday and Thursday afternoon
【单选题】According to the passage, if FSAs are unable to provide the assistance, ______.
A.
they make apology to you
B.
they keep silence
C.
the introduce you to the agency or person concerned
D.
they just say sorry
【单选题】VPN服务器Router的R1(VPN Server)的配置代码，定义为预共享密钥认证方式的命令行是（）
A.
match address 118
B.
authentication pre-share
C.
hash md8
D.
crypto dynamic-map rtpmap 13
【单选题】According to the passage, it may soon be possible
A.
to make something as good as human skin.
B.
toproduce drugs without side effects.
C.
to transplant human organs.
D.
to make artificial hearts and eyes.
【单选题】VPN服务器Router的R1(VPN Server)的配置代码，创建动态保密图的命令行是
A.
match address 117
B.
authentication pre-share
C.
hash md7
D.
crypto dynamic-map rtpmap 12
【简答题】服务器Router的R1( Server)的配置代码，r1(config)# crypto isakmp policy 1 的意思是
【单选题】VPN服务器Router的R1(VPN Server)的配置代码，定义MD5散列算法是
A.
match address 115
B.
authentication pre-share
C.
hash md5
D.
crypto dynamic-map rtpmap 10
【单选题】According to the passage, leisure is not the time to ______.
A.
make preparations for the work of the next period of time
B.
recover from the physical and mental fatigue of work
C.
free ourselves from the pressure of the work
D.
seek pleasure
【单选题】VPN服务器Router的R1(VPN Server)的配置代码，援引访问列表确定受保护的流量命令行是（）
A.
match address 116
B.
authentication pre-share
C.
hash md6
D.
crypto dynamic-map rtpmap 11
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