Cement wash, bitumen and paint
Metal primers, undercoats and topcoats
Varnishes, heat-resistant paints and anti-fouling paints
Cement wash, primer and undercoat
第1题：
A. It is a hub device installed in the community.
B. A community can have one or more registration servers.
C. It shows the serial numbers of all devices in the community.
D. It stores network and community information for each device.
E. It is required for tunnel formation between different WX devices in the same community.
第2题：
According to the last paragraph, the fourth way is "of a different kind" because（ ）
[A] the first three ways can increase the water supply, while the fourth one can't
[B] the first three ways can make a better use of water, while the fourth one can't
[C] the first three ways is technology-based, while the fourth one is market-based
[D] the first three ways can't balance the supply and demand of water, while the fourth one can
第3题：
Which of the following addresses can be assigned to a host when using a subnet mask of 255.255.254.0? (Select three)
A. 113.10.4.0
B. 186.54.3.0
C. 175.33.3.255
D. 26.35.2.255
E. 152.135.7.0
F. 17.35.36.0
第4题：
Oil is an important（）material which can be processed into many different products, including plastics.
Auncovered
Braw
Cfresh
Dcrude
第5题：
第6题：
A.10.15.32.17
B.17.15.66.128
C.66.55.128.1
D.135.1.64.34
E.129.33.192.192
F.192.168.5.63
第7题：
第8题：
A. Each pluggable database (PDB) has its own set of background processes.
B. A PDB can have a private temp tablespace.
C. PDBs can share the sysaux tablespace.
D. Log switches occur only at the multitenant container database (CDB) level.
E. Different PDBs can have different default block sizes.
F. PDBs share a common system tablespace.
G. Instance recovery is always performed at the CDB level.
第9题：
第10题：
（）are the three different coatings which can protect metal from corrosion.