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【单选题】
关于消化道平滑肌的基本电节律,下列哪错误的:A.
在胃肠不收缩的情况下，也可记录到基本电节律
B.
其波幅和频率与平滑肌组织在消化道中所处的位置无关
C.
起源于纵行肌层
D.
其产生是肌源性的
E.
是动作电位产生的基础
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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
【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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