单项选择题

A．Because it is short of vitamins.
B．Because it is not very clean.
C．Because there are additives.
D．Because there are not many varieties.
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单项选择题
I think symmetry may be the only way to achieve simplicity, so it’’s important enough to be mentioned on its own.
A．Y
B．N
C．NG
单项选择题
A．To compete for customers.B．To reduce the size of their staff.C．To provide services for distant clients.D．To expand their operations at a lower cost.
A．To compete for customers.
B．To reduce the size of their staff.
C．To provide services for distant clients.
D．To expand their operations at a lower cost.
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