A.a

B.d

C.c

D.b

正确答案：d

13、Select the correct top view（）

A.d

B.b

C.a

D.c

正确答案：b

第四章单元测试

1、What are the regulations of three views？ main view and left view ：； main view and top view：； top and left view：.

A.same height； same witdh； same length

B.same height； same length； same width

C.same length； same height； same width

D.same width； same length； same height

正确答案：same height； same length； same width

2、is the dashed line necessary in isometric projection？

A.正确

B.错误

正确答案：错误

3、How much is the axes angle of isometric projection

A.90°

B.60°

C.125°

D.120°

正确答案：120°

4、longer dimension should be outside of short ones.。

A.正确

B.错误

正确答案：正确

5、The overall length is necessary for a round end plate.。

A.正确

B.错误

正确答案：错误

6、The three types of dimension include shape dimension， location dimension and overall dimension。

A.正确

B.错误

正确答案：正确

7、select the correct view.

A.b

B.c

C.d

D.a

正确答案：d

8、Select the correct left view（）

A.a

B.d

C.b

D.c

正确答案：c

9、Select the correct top view（）

A.c

B.b

C.d

D.a

正确答案：b

10、Select the correct top view（）

A.c

B.d

C.a

D.b

正确答案：b

第五章单元测试

1、How much is the inclined angle of hatching for the commonly used metallic material

A.60°

B.90°

C.30°

D.45°

正确答案：45°

2、An object be represented as local section in the condition that both the outside and inside are complex， and its structure is not symmetry。

A.正确

B.错误

正确答案：正确

3、when several parallel cutting planes are used to cut， there will be a bold line at the corner of turning point.。