下述传染病中,病后可有较持久免疫力的是()
A.霍乱
B.脊髓灰质炎
C.细菌性痢疾
D.伤寒
E.钩端螺旋体病(同型)
参考答案:B, D, E
— I am gaining weight. I need to see a doctor.
— But I think you eat too much. __________.
A.Neglect(忽视) of health is doctor’s wealth
B.Laugh at your ills, and save doctors’ bills
C.Diet cures more than the doctor
D.An apple a day keeps the doctor away
观察下面图案,在A,B,C,D四幅图案中,能通过下面图案平移得到的是
A.
B.
C.
D.