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【多选题】
下列蒽醌的乙醚溶液中,用5%碳酸钠萃取,可溶于碳酸钠层的有A.
1，8-二羟基蒽醌
B.
1，3-二羟基蒽醌
C.
1，3，4-三羟基蒽醌
D.
1，8-二羟基-3-羧基蒽醌
E.
1，4，6三羟基蒽醌
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皮皮学刷刷变学霸
举一反三
【简答题】The committee agreed that his papers a wider circulation because of their essential and fundamental interest to a larger audience.
【简答题】The committee agreed that his papers __a wider circulation because of their essential and fundamental interest to a large audience.
【单选题】After describing the planned improvements, she went on _______ how much they would cost.
A.
to explain
B.
explaining
C.
to be explaining
D.
having explained
【单选题】. She said she was in great need of such a table and asked me how much________table would cost.
A.
such a beautiful wooden round
B.
one such beautiful round wooden
C.
one such round beautiful wooden
D.
such a round beautiful wooden
【单选题】The committee agreed that his papers ___ a wider circulation because of their essential and fundamental interest to a larger audience.
A.
proceed
B.
grant
C.
lodge
D.
deserve
【单选题】The committee agreed that his papers ____ a wider circulation because of their essential and fundamental interest to a larger audience.
A.
preserved
B.
conserved
C.
deserved
D.
reserved
【单选题】根据梯度风的关系,在自由大气层中闭合高压系统的风向应为:
A.
南、北半球均逆时针旋转
B.
北半球逆时针旋转，南半球顺时针旋转
C.
南、北半球均顺时针旋转
D.
北半球顺时针旋转，南半球逆时针旋转
【单选题】The chairman of the committee agreed to the proposal that the issue _____ put to the vote.
A.
is
B.
was
C.
be
D.
were
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