皮皮学，免费搜题
登录
搜题
【单选题】
如图所示，可以将机翼与机身连接处简化为下面哪种约束？【图片】A.
铰链约束
B.
固定端约束
C.
轴承约束
D.
球铰约束
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】阅读理解。 Most dog owners feel that their dogs are their best friends. Almost everyone likes dogs because they try hard to please their owners. One of my favorite stories is about a dog who wanted his own...
【单选题】A recent survey revealed that __________ dogs barking incessantly in the night that we disliked most.
A.
was
B.
there be
C.
it was
D.
there were
【简答题】Most dog owners feel that their dogs are their best friends. Almost everyone likes dogs because they try hard to please their owners. One of my favorite stories is about a dog who wanted his owner to ...
【单选题】Why do most Americans like dogs better?
A.
Because dogs leave people alone.
B.
Because dogs like to be with people.
C.
Because dogs are willing to do things for people.
D.
Because all dogs, including wild dogs, are friendly.
【单选题】Dogs are too _____ to take care of.
A.
difficult
B.
more difficult
C.
most difficult
D.
the most difficult
【简答题】阅读理解。 Most dog owners feel that their dogs are their best friends. Almost everyone likes dogs because they try hard to please their owners. One of my favorite stories is about a dog who wanted his own...
相关题目：