皮皮学,免费搜题
登录
搜题
【单选题】
Cylog, a leading provider of personal computer systems, began manufacturing tablet devices after predicting a future consumer need for portability. Which of the following was most likely implemented by Cylog?
A.
the selling concept
B.
customer-driving marketing
C.
the product concept
D.
sustainable marketing
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
【多选题】对连杆的描述正确的是:
A.
连杆要求足够的刚度和强度
B.
连杆质量要尽可能的小
C.
连杆大头和连杆盖需要定位
D.
半个连杆轴承在自由状态下是半圆形
【单选题】It was the first time that I ______ Jackson’s songs.
A.
have listened
B.
have listened to
C.
had listened to
D.
had listened
【单选题】Had you listened to the doctor, you _______ all right now.
A.
are
B.
would be
C.
were
D.
would have been
【单选题】___ you ___ to the 6:30 broadcast? [     ]
A.
Have-listened
B.
Did-listen
C.
Had-listened
D.
would-listen
【多选题】对连杆的描述正确的是:
A.
连杆要求足够的刚度和强度
B.
连杆质量要尽可能的小
C.
连杆大头和连杆盖需要定位
D.
连杆杆身采用了"工"字形断面
【判断题】如图所示的回路,若马达在重物的重力作用下发生超速运转时,右侧油路由于背压减小,使平衡阀 2 阀口关小以消除超速现象。
A.
正确
B.
错误
【多选题】关于连杆参数的描述正确的是:
A.
连杆长度ai :两个关节轴线沿公垂线的距离(恒正,zi-1到zi距离)。
B.
连杆扭角αi :垂直于ai的平面内两个轴线的夹角(有正负,zi-1到zi)。
C.
连杆间距离di:沿关节i轴线两个公垂线的距离(有正负,沿Zi-1,i-1->i)。
D.
连杆间转角θi:垂直于关节i轴线的平面内两个公垂线的夹角(有正负,绕Zi-1, Xi-1 ->Xi )。
【判断题】如图所示的回路,若马达在重物的重力作用下发生超速运转时,左侧油路由于供油不及而使压力下降,换向阀3位于下位可使右侧油路油液流入左侧油路以消除超速现象。【图片】
A.
正确
B.
错误
【判断题】承力索中心锚结一般采用GJ-70钢绞线作为锚结绳,一般由三跨组成。
A.
正确
B.
错误
【单选题】Had you listened to the doctor, you ______ all right now.
A.
are
B.
were
C.
would be
D.
would have been
相关题目: