单项选择题

In this passage, the author mainly discusses ______.

A．research about mental function
B．gradual loss of mental skills with normal aging
C．the relationship between mental function and skills
D．effective ways to keep intellectual vigor

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热门试题

单项选择题

Which kind of people will keep intellectual vigor

A．A person in a stable marriage with a stimulating spouse.
B．A lucky person.
C．A person who likes asking.
D．A relatively poor person.

单项选择题

What does sagging (para.5) probably mean A) Decline. C) Become more active. B) Develop. D) Become stronger.

A．What does "sagging"(para.5) probably mean
B．Decline.
C．Develop.
D．Become more active.
E．Become stronger.