龋病的发病率表示在一特定观察期间内,新发龋病的频率,观察期间一般选择()。
A.年
B.月
C.季
D.周
E.日
参考答案:A
在正常人右心房压力为()
A.10~20mmHg
B.5~15mmHg
C.15~20mmHg
D.0~10mmHg
E.25~30mmHg
When college students _____ future employment, they often think of status, income, and prestige.
A.demand
B.assume
C.apply
D.anticipate