皮皮学，免费搜题
登录
搜题
【单选题】
一个渐开线圆柱齿轮上有两个可见圆和两个不可见圆,它们分别是()。A.
分度圆、齿顶圆、基圆、齿根圆
B.
齿顶圆、基圆、分度圆、齿根圆
C.
分度圆、基圆、齿顶圆、齿根圆
D.
齿顶圆、齿根圆、分度圆、基圆
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】妊娠合并淋菌感染下列哪项是不恰当的
A.
对可疑感染者取分泌物培养可确诊
B.
易发生胎儿宫内感染
C.
妊娠早期可致感染性流产
D.
治疗首选喹诺酮类药物
E.
淋病高发区孕妇产前常规筛查淋菌
【判断题】() When we say dogs are friends of humans, we usually think of them as a mental abstraction.
A.
正确
B.
错误
【单选题】When making a comparision between the past and the present condition of a place , we might say ' It's gone to the dogs '. What does it mean ?
A.
It is in a much better condition now than it was before .
B.
It is in almost the same condition now as it was before .
C.
It is in a much worse condition now than it was before .
D.
There are many dogs here now , but there weren't brfore .
【简答题】We have heard it repeatedly: most people do not get enough exercise. Yet when we look at our dogs, we say we do not give them enough exercise either. Do dogs enjoy exercise? Of course they do. Just as...
【简答题】用户数据报协议
【简答题】Dogs can also go to school to learn how to help people who cannot hear. If a person cannot hear, we say he or she is deaf. Dogs who help deaf people must learn many different sounds. Then they must be...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
