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【单选题】
It was obvious that the Climate Change Conference in Copenhagen became the ________ o f media attention. [     ]
A.
discovery
B.
focus
C.
summary
D.
comment
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举一反三
【单选题】Aboard ship, SafetyNET messages can be received by which equipment?
A.
VHF DSC
B.
NAVTEX receiver
C.
Dedicated receiver or optional receiver integrated in vessel’s SES.
D.
All of these.
【简答题】间接碘量法测定铜含量时,KI的作用是( )
【单选题】间接碘量法测定铜盐含量时,用()调节反应溶液的pH值。
A.
盐酸
B.
硫酸
C.
醋酸
D.
硝酸
【简答题】碘量法测定复方碘口服液中碘含量的计算式
【单选题】间接碘量法测定铜含量时,滴定终点的颜色是( )。
A.
滴定开始时
B.
滴定至接近终点时
C.
滴定至 3 0 % 时
D.
滴定至 5 0 % 时
【单选题】SafetyNET messages can be received by which of the following shipboard equipment?
A.
NAVTEX.
B.
MF and HF NBDP.
C.
EGC receiver.
D.
None of these
【单选题】SafetyNET messages can be received by which of the following shipboard equipment?
A.
NAVTEX
B.
MF and HF NBDP
C.
EGC receiver
D.
All of these
【单选题】By which of the following shipboard equipment can SafetyNET messages be received? .
A.
NAVTEX.
B.
MF and HF NBDP.
C.
EGC receiver.
D.
AIS receiver.
【判断题】在我国改革开放的初期阶段所进行的税制改革的主要内包括初步建立涉外税制,实行两步“利改税”。
A.
正确
B.
错误
【判断题】用碘量法测定硫酸铜中铜含量的实验中,在接近终点时才加入KSCN。
A.
正确
B.
错误
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