Colour-blind people often find it difficult to () between blue and green.
A. separate
B. compare
C. distinguish
D. contrast
查看答案
Quite a lot of people watch TV only to ______ time.
A. waste
B. spend
C. kill
D. while
We have many holidays from the end of March till the beginning of April They are the best days for ().
A. blade
B. coincidence
C. balcony
D. entertainment
李某和王某系邻居,王某出差半年不在家,自家院墙在一次暴风中被刮倒,李某未受王某任何嘱托,主动帮王某修葺墙壁,以免伤及路人,王某出差归来,李某向其索要相关的修葺费用。则李某的行为构成( )。
A. 侵权行为
B. 不当得利
C. 情谊行为
D. 无因管理
在解决河内塔问题时人们采用的策略是( )
A. 算法
B. 逆向搜索
C. 爬山法
D. 手段一目的分析