It is most desirable that he ______ for the information by himself with a few clicks online.
A. search
B. searched
C. has searched
D. will search
He is used to flying by air and on no occasion ______ frightened.
A. hehas everfeIt
B. he everfeels
C. everdoeshefeel
D. hashe everfelt
有的退休老人还有继续工作的愿望和需要,希望发挥专长,也有的闲下来打算好好享受生活,养花、养宠物、书法绘画等成为他们的新需要。这些属于老人需要中的( )。
A. 经济保障
B. 就业休闲
C. 居家安全
D. 健康维护
在Java语言中,下列属于合法标识符的是( )。
A. _book
B. 5file
C. +static
D. -3.14159