大学MOOC Engineering Mechanics （《工程力学》全英文）(南京林业大学)1450305641 最新慕课完整章节测试答案
01 Reductions of force systems
Tests for week 1-2
1、单选题：
As shown in the parallelogram, all forces are at point A. In which figure FR can be considered as the resultant of F1 and F2?
选项：
A: 
B: 
C: 
D: 
答案: 【 】
2、单选题：
Neglect the weights of all members. In which case bar BD is not a two-force member?
选项：
A: 
B: 
C: 
D: 
答案: 【 】
3、单选题：
To study the whole system, which free-body diagram is correct?
选项：
A: 
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