【单选题】【消耗次数：1】
( )是人和动物在历史形成过程中所获得的免疫力。
①
种族免疫
②
后天免疫
③
历史免疫
④
先天免疫
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
12. I’m very sorry to have _______ you with so many questions on such an occasion.
①
interfered
②
offended
③
impressed
④
bothered
【单选题】
7. It is so quiet that you can hear a pin ______.
①
dropping
②
. dropped
③
drop
④
drops
【单选题】
4. The instructor watched the student ____ the test.
①
to take
②
take
③
takes
④
took
【单选题】
20. _____ the sight of the poor and the sick, the government had no way out but to decided to reform..
①
Seeing
②
Confronted with
③
Confronting
④
Looking at
【单选题】
1. Decide which of the following best states the authors purpose of writing?
①
To express his anguish of movig from his old home
②
To describe the laughter and tears of the four generations of his family
③
to explain the real meaning of his grandpas wordsneversay googbye‘
④
To tell the story of his grandpas death
【单选题】
21. Take good care to _____ your jewelry before going on away on holiday..
①
safe
②
lock in
③
lock away
④
lock with
【单选题】
16. He was put into prison, but he never _____ ,and continued his fight.
①
gave up
②
gave in
③
stopped
④
gave way
【判断题】
If too many details are retained in a precis, it can hardly be considered a good precis.
①
正确
②
错误