闭经是指月经停止
A.至少3个月B.至少6个月C.至少2年D.至少12个月E.至少3年
参考答案:B
He said that his brother was the first _____ to the cinema.
A. of getting
B. to get
C. got
D. getting
坚持参加体育锻炼的人,对心血管的影响是( )
A.心肌发达,收缩有力
B.减缓血液循环
C.输送血液的功能减弱
D.导致运动过度,损伤心脏的功能