It is generally believed that swimming is one of the best ways for a person to ______ good
A. reserve
B. sustain
C. preserve
D. maintain
原发性小血管炎所致急进性肾炎(Ⅲ型)，临床出现大咯血，应首选
Which of the following is not true of credit unions？______.
A. Credit unions are nonprofit depository institutions mutually organized and owned by their members.
B. Members deposit their savings and these funds are then lent to the general public.
C. Their net income is tax-exempt.
D. All of the above are true.
如果大家都不愿意冒险，风险报酬斜率就小，风险报酬率也越低。()
A. 正确
B. 错误
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