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【单选题】Now our biggest summertime question has been answered: Why do people look so much better in sunglasses Vanessa Brown, a senior lecturer of art and design at Nottingham Trent University, gave an inside...
A.
introduce the major functions of sunglasses
B.
describe the evolution of sunglasses
C.
explain why sunglasses improve appearance
D.
demonstrate how to make better use of sunglasses
相关题目：
【单选题】对称三相绕组的特点不包括( )。
A.
每相的导体数、并联支路数相等
B.
导体规格一样
C.
每相导体或线圈在空间的分布规律一样
D.
三相绕组的绕法不同
【单选题】管螺纹的牙型是 。
A.
三角形
B.
矩形
C.
梯形
D.
锯齿形
【判断题】吊钳的牙形只有直牙型。
A.
正确
B.
错误
【判断题】在加密类型中，RSA是对称加密。()
A.
正确
B.
错误
【多选题】按螺纹牙型不同,常用的螺纹有( )、( )、( )和( )。
A.
三角形螺纹
B.
矩形螺纹
C.
梯形螺纹
D.
锯齿形螺纹
【单选题】Now our biggest summertime question has been answered: Why do people look so much better in sunglasses Vanessa Brown, a senior lecturer of art and design at Nottingham Trent University, gave an inside...
A.
introduce the major functions of sunglasses
B.
describe the evolution of sunglasses
C.
explain why sunglasses improve appearance
D.
demonstrate how to make better use of sunglasses
【判断题】螺纹的基本要素:牙型,直径,螺距,线数和旋向.( )
A.
正确
B.
错误
【单选题】普通螺纹的牙型符号是:( )
A.
M
B.
G
C.
B
D.
Tr
【单选题】点（﹣2，4）关于x轴对称的点的坐标是 [ ]
A.
（﹣2，﹣4）
B.
（﹣2，4）
C.
（2，﹣4）
D.
（2，4）
【多选题】常见的螺纹牙型有:
A.
矩形
B.
锯齿形
C.
梯形
D.
三角形
【单选题】T1:点(3,4,7)关于y轴对称的点的坐标是()
A.
(3,-4,7)
B.
(-3,4,7)
C.
(-3,-4,-7)
D.
(-3,4,-7)
【单选题】锯齿形螺纹的牙型代号是（）.
A.
S
B.
G
C.
T
D.
M