单项选择题
A. 人在新环境中感受到的困惑和挫折会使一个人丧失自信。 B. 陌生环境带来的困惑和挫折会击败一个人的自信。 C. 困惑和挫折很容易削弱一个在新环境中的人的自信。 D. 陌生的环境带来的困惑和挫折很容易削弱一个人的自信。
A.a place of interest named Valentine B.a Christian named Valentine C.an emperor named Valentine D.a card sent to Valentine
A.It can help mankind solve the problem of planting tomatoes. B.It can help mankind solve the problem of watering. C.It can help. mankind solve the problem of salt. D.It can help mankind solve the problem of feeding its population.