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【单选题】
能量通过约1.5亿km的空间到达地球的大气层附近时，其辐射能量密度约为()，这个值叫太阳常数。A.
1.8kw/m²
B.
1kw/m²
C.
2kw/m²
D.
1.4kw/m²
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举一反三
【简答题】腿脚的防护装置如何配带?
【单选题】The largest source of bank income is _________
A.
interest on loans.
B.
interest on securities.
C.
service charges on deposit accounts.
D.
noninterest income.
【简答题】Next to coal-burning power plants,______are the second largest U.S. source of carbon dioxide pollution.
【单选题】The largest source of a bank's income is______.
A.
its portfolio of securities
B.
service charges and fees
C.
interest on deposit
D.
its portfolio of loans
【单选题】The largest source of income of a bank is through ___.
A.
lease
B.
transactions
C.
exchanges
D.
loans
【单选题】The largest source of government revenues is ________.
A.
personal income taxes
B.
indirect taxes
C.
corporate income taxes
D.
social security taxes
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