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【多选题】
下面哪些是目前E-TRADE可向客户提供的功能（）。A.
进口信用证开证及修改申请
B.
出口直接托收申请
C.
汇出汇款以及汇入汇款查询申请
D.
电子邮件和手机短信通知
E.
业务查询及报表数据下载
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【单选题】根据以下材料，回答题 Better Solar Energy Systems: More Heat， More Light Solar photovoltaic thermal energy systems， or PVTs， generate both heat and electricity， but__________ （51） now they haven't been very good...
A.
until
B.
unless
C.
when
D.
if
【简答题】Installing solar systems to power homes, schools, health clinics and communities is part of SELF's____________
【单选题】What is one advantage of solar drip irrigation systems mentioned in the passage?
A.
They are more reliable.
B.
They have initial advantage.
C.
They don't break down from time to time.
D.
They are more economical over time.
【单选题】According to the last paragraph, what can be concluded?
A.
Solar and wind energy systems cost a lot for producing electricity.
B.
People had better pay for the utility instead of producing electricity.
C.
Solar and wind energy can provide cheap and continuous electricity.
D.
Solar and wind energy is reasonable and cheap for remote villagers.
【单选题】Rafi says that solar-energy systems ()
A.
are expensive, but they save money in electric bills
B.
are cheaper to put in than other systems
C.
will increase peopleâs electric bills
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