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听力原文:M: It is reported that in some countries banks are not allowed to make investment
W: Generally commercial banks may invest only in those securities that are rated as "investment grade", or have bond ratings in the top four categories.
Q: Where are banks only allowed to make investments?
(15)
A.In equity securities.
B.In personal funds.
C.In securities rated as investment grade.
D.In property markets.
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