皮皮学，免费搜题
登录
搜题
【单选题】
油葵育种重，在知识产权不能得到有效保护时，育种者牢牢掌握（ ），就能保证品种不能被他人盗取，A.
自交系
B.
不育系
C.
恢复系
D.
保持系
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】It was a pity that he __ blind, but to the joy of his family, his dream of becoming a musician _____ true at last.
A.
came; came
B.
went; went
C.
came; went
D.
went; came
【单选题】Ryan,with the help of others, is fulfilling his dream of help African peopleto____________
A.
make new materials
B.
preserve wetland and animals
C.
have clean air
D.
have clean water
E.
collect cigarette butts
F.
collect disposed oil
【单选题】设事件A，B，C两两独立，则事件A，B，C相互独立的充要条件是( )．
A.
A与BC相互独立
B.
AB与A+C相互独立
C.
AB与AC相互独立
D.
A q—B与A+C相互独立．
【单选题】设事件A,B,C 两两相互独立,则A,B,C 相互独立的充分必要条件是( )
A.
A 与BC 独立
B.
AB 与A +C 独立
C.
AB 与AC 独立
D.
A +B 与A +C 独立
【单选题】设事件A，B，C两两独立，则事件A，B，C相互独立的充要条件是( )．
A.
A与BC相互独立
B.
AB与A+C相互独立
C.
AB与AC相互独立
D.
A+B与A+C相互独立．
【简答题】Ryan,with the help of others,is fulfilling his dream of help African people to ___________．
【单选题】他相信自己想当证券经纪人的梦想总有一天会实现。
A.
He believes that a day his dream of becoming a stockbroker will come out.
B.
He trusts that one day his dream of being a stockbroker will come.
C.
He believes that one day our dreams of becoming a banker will come true.
D.
He believes that one day his dream of becoming a stockbroker will come true.
相关题目：
【单选题】设事件A,B,C 两两相互独立,则A,B,C 相互独立的充分必要条件是( )
A.
A 与BC 独立
B.
AB 与A +C 独立
C.
AB 与AC 独立
D.
A +B 与A +C 独立