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【单选题】
用户数据报(UDP)协议是互联网传输层的协议之一，下面的应用层协议或应用软件使用UDP协议的是（）A.
SMTP
B.
WWW
C.
DNS
D.
FTP
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皮皮学刷刷变学霸
举一反三
【单选题】You can go to Nancy. She is always . [ ]
A.
ready to h elp others
B.
ready to help the others
C.
ready for help others D .ready for help the others
【单选题】He is a new comer. There is no one _____, so let’s go and help him, shall we?
A.
who to turn to
B.
for him to turn
C.
for whom to turn
D.
he can turn to
【简答题】A．They help people save time on housework. B．They go into the garbage heap. C．They are harmful to the environment. D．They make products more expensive.
【单选题】I would ______ to help my sister.
A.
go to great effort
B.
go to great might
C.
go to great strengths
D.
go to great lengths
【单选题】When a friend gave Tom a ticket he ________ to the game．
A.
couldn’t help but go
B.
couldn’t help but going
C.
can’t help but to go
D.
can’t help but going
【简答题】二力构件所受二力的作用线一定是沿着此二力作用点的 , , 。
【简答题】A．Take a history exam B．Go to an art exhibit C．Meet some classmates D．Help the man with his painting
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