有些决策（或动作）是与几个条件有关，此时能很直观地表达处理逻辑关系的是（）
A.决策树
B.决策表
C.流程图
D.结构化语言
参考答案：A, B
Mr. Smith's _________. Let's wait for him here. [ ]
A. hasn't arrived
C. doesn't arrive
B. didn't arrive
D. couldn't arrive
-15℃等于多少开尔文？293.15K等于多少摄氏度？
