单项选择题

According to the passage, the customers pay more attention to

A．e-commerce companies' financial stability.
B．e-commerce companies' financial resources.
C．e-commerce companies' financial longevity~
D．e-commerce companies' financial security.

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热门试题

单项选择题

The rats fed unrestricted diets do NOT

A．have one preventing-aging protein increased.
B．have their cell death increased or doubled.
C．have their DNA fragmentation doubled.
D．have the levels of proteins increase

单项选择题

The main purpose of these researchers is

A．to help to destroy old cells and boost new ones.
B．to alter the natural process known as apoptosis.
C．to compare different levels of proteins.
D．to find out ways to protect aging brain cells.