司令部内部外部关系的主要特点不包括（）
A.复杂性
B.制约性
C.互补性
D.开放性
参考答案：D
Many young people in the West are expected to leave ________ could be life's most important
decision-marriage-almost entirely up to luck.[ ]
A. as
B. that
C. which
D. what
大脑脚
ntirely up to luck.[ ]