以下有价证券能够带来基本收益的是( )。
A．普通股
B．附息债券
C．优先股
D．商业票据
参考答案：B,C
______himself to his lab research, the famous scientist missed ________from the liver cancer.
A．Devoted; being saved
B．Devoting; being saved
C．Devoted; to be saved
D．Devoting; to be saved
