单项选择题

The author thinks that pull factors______.

A．are all related to economic considerations.
B．are not as decisive as push factors.
C．include a range of consideration.
D．are more important than push factors.

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单项选择题

What is the passage mainly about

A．How biochemical changes occur in the human brain.
B．Why people should keep active not only physically but also mentally.
C．How intellectual activities influence brain-cell health.
D．Why people should receive special mental training as they ag

单项选择题

Good looks cut both ways for women (Par

A．5) means that______.A. attractive women have tremendous potential impact on public jobB. good-looking women always get the best of everythingC. being attractive is not always an advantage for womenD. attractive women do not do as well as unattractive women in managerial positions