Which of the following choices are properties of the active immunization?
A. It can induce antibody secretion;
B. It can provide immediate protection;
C. It can provide long term protection;
D. It is induced by vaccine injection
查看答案
Toxoid can induce production of antitoxin in a host.
A. 对
B. 错
Passive immunotherapy provides more prolonged immunity than active immunization.
A. 对
B. 错
It is standard to attenuate killed virus vaccines.
A. 对
B. 错
半自动售票机用于现场人工辅助发售、赋值有效车票，具有售票、补票、退票、查询、更新等功能。（）
A. 对
B. 错
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