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【多选题】
关于渐开线齿轮传动,下列说法正确的是?
A.
无论什么类型齿轮传动,能够正确啮合传动的条件之一都是模数相同
B.
当需要在两垂直轴间传动运动时,应首先选择圆锥齿轮传动
C.
当需要在有一定角度(不垂直)的两轴间传动运动时,应首选选择斜齿轮传动
D.
当两轴之间的夹角偏大时,宜采用一对螺旋角方向相同的斜齿轮传动
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举一反三
【单选题】Tom never gets up early and he doesn't like to be ______ 10:00 a. m.
A.
called off
B.
called for
C.
called at
D.
called on
查看完整题目与答案
【单选题】Our teacher punished Tom for his being late for school last month. ______, Tom gets up early every day and is never late again.
A.
Now and then
B.
From then on
C.
Till then
D.
Just then
查看完整题目与答案
【单选题】Alice ________ early, but she doesn’t like to ________ early.
A.
gets up; wake up
B.
wakes up; gets up
C.
gets up; wakes up
D.
wakes up; get up
查看完整题目与答案
【简答题】Bruce shook his money box again. Nothing! He carefully counted the coins that lay on the bed. All that he had was $24.52. The 31 which he wanted was at least $90. How on earth( 究竟 ) was he going to ge...
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【单选题】关于细胞外基质,下列哪项错误( )。
A.
是细胞产生的非细胞质
B.
具有支持、联系、保护和营养的作用
C.
参与构成细胞的微环境
D.
血浆、淋巴液、组织液等体液不属于细胞间质
查看完整题目与答案
【简答题】读一读，根据短文内容，判断正(T )误(F )。 On Sunday, Tom usually gets up at 9 0'clock. Today, Tom got up at six, because he wouldgo to a picnic (野餐) with his parents. But it was raining, so they couldn't go to the pic...
查看完整题目与答案
【单选题】Peter was a small boy. He lived with his parents in a small house near some hills. The people there were all poor.One night it was very dry and windy.When everybody was asleep, Peter suddenly heard so...
A.
sisters
B.
brothers
C.
parents
查看完整题目与答案
【单选题】关于单层扁平上皮的描述,下列哪项错误
A.
．细胞多，细胞外基质少，排列紧密
B.
．细胞边界平整，无细胞间连接
C.
．表面光滑，阻力小
D.
．细胞扁薄,利于物质交换
查看完整题目与答案
【简答题】第三部分：阅读理解（共两节，满分40分） 第一节（共15小题，每题2分，共30分） His parents were told to take him home to die after his rare leukaemia(白血病)returned a THIRD time.”They said there was nothing more they could do and gave him ...
查看完整题目与答案
【单选题】Tom gets up _____ 7:00 _____ Saturday morning. [     ]
A.
in; on
B.
at; in
C.
at; on
D.
at; for
查看完整题目与答案
相关题目：
【单选题】Tom never gets up early and he doesn't like to be ______ 10:00 a. m.
A.
called off
B.
called for
C.
called at
D.
called on
查看完整题目与答案
【单选题】Our teacher punished Tom for his being late for school last month. ______, Tom gets up early every day and is never late again.
A.
Now and then
B.
From then on
C.
Till then
D.
Just then
查看完整题目与答案
【单选题】Alice ________ early, but she doesn’t like to ________ early.
A.
gets up; wake up
B.
wakes up; gets up
C.
gets up; wakes up
D.
wakes up; get up
查看完整题目与答案
【简答题】Bruce shook his money box again. Nothing! He carefully counted the coins that lay on the bed. All that he had was $24.52. The 31 which he wanted was at least $90. How on earth( 究竟 ) was he going to ge...
查看完整题目与答案
【单选题】关于细胞外基质,下列哪项错误( )。
A.
是细胞产生的非细胞质
B.
具有支持、联系、保护和营养的作用
C.
参与构成细胞的微环境
D.
血浆、淋巴液、组织液等体液不属于细胞间质
查看完整题目与答案
【简答题】读一读，根据短文内容，判断正(T )误(F )。 On Sunday, Tom usually gets up at 9 0'clock. Today, Tom got up at six, because he wouldgo to a picnic (野餐) with his parents. But it was raining, so they couldn't go to the pic...
查看完整题目与答案
【单选题】Peter was a small boy. He lived with his parents in a small house near some hills. The people there were all poor.One night it was very dry and windy.When everybody was asleep, Peter suddenly heard so...
A.
sisters
B.
brothers
C.
parents
查看完整题目与答案
【单选题】关于单层扁平上皮的描述,下列哪项错误
A.
．细胞多，细胞外基质少，排列紧密
B.
．细胞边界平整，无细胞间连接
C.
．表面光滑，阻力小
D.
．细胞扁薄,利于物质交换
查看完整题目与答案
【简答题】第三部分：阅读理解（共两节，满分40分） 第一节（共15小题，每题2分，共30分） His parents were told to take him home to die after his rare leukaemia(白血病)returned a THIRD time.”They said there was nothing more they could do and gave him ...
查看完整题目与答案
【单选题】Tom gets up _____ 7:00 _____ Saturday morning. [     ]
A.
in; on
B.
at; in
C.
at; on
D.
at; for
查看完整题目与答案