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【多选题】
以下关于渐开线齿廓啮合特性的描述，哪些是正确的A.
渐开线齿廓能满足齿廓啮合基本定律，且能满足定传动比传动。
B.
一对渐开线齿廓的啮合点的轨迹是一定直线
C.
一对渐开线齿廓啮合传动的传动比取决于两轮的节圆半径反比或两轮的基圆半径反比
D.
一对渐开线齿廓的啮合线始终与其过齿廓接触点的公法线重合，而恒切的分度圆；
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【单选题】Your mother told me that you overslept this morning, ______?
A.
didn't she
B.
didn't you
C.
did she
D.
did you
【单选题】Jack didn't telephone his mother because ______ .
A.
he was too busy
B.
his telephone didn't work
C.
his mother had no telephone
【简答题】制定幼儿园教育目标的依据是国家的教育目的和幼儿园教育的______。
【单选题】分部分项工程量清单是指表示拟建工程分项实体工程项目名称和相应数量的明细清单,应包括的要件是()。
A.
项目编码、项目名称、计量单位和工程量
B.
项目编码、项目名称、项目特征和工程量
C.
项目编码、项目名称、项目特征、计量单位和工程单价
D.
项目编码、项项目名称、项目特征、计量单位和工程量
【单选题】In this story,the woman didn't find Bruce 's mother because___。
A.
she wenr to the wrong house。
B.
She didn't know Bruce 's mother。
C.
Bruce was not at home。
D.
Bruce didn't have a mother。
【单选题】Which of the following sentences is INCORRECT?
A.
You didn't hear mother call and I didn't either.
B.
Either of parents is capable of mending the machine.
C.
Come on Saturday or Sunday. Either is OK.
D.
I don't think either of them is at home.
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