【单选题】What made Joseph give up his dream of buying the Lego Death Star?
A.
The extremely high price of the toy.
B.
The denying attitude of the father.
C.
The time he needs to save up the money.
D.
The change of his focus of interest.
【单选题】Ryan,with the help of others, is fulfilling his dream of help African peopleto____________
B.
preserve wetland and animals
E.
collect cigarette butts
【简答题】设三事件A、B、C两两独立,则A、B、C相互独立的充要条件为( ). (a) A与BC独立 (b) AB与A∪C独立 (c) AB与AC独立 (d) A∪B与A∪C独立
【判断题】在考量和描写学习者的汉语学习水平时,需要制定科学的、操作方便的、绝对的标准。
【单选题】设事件A,B,C两两独立,则事件A,B,C相互独立的充要条件是( ).
【简答题】Ryan,with the help of others,is fulfilling his dream of help African people to ___________.
【单选题】设A、B、C三事件两两独立,则A、B、C相互独立的充要条件是()。 A、A与BC独立 B、AB与A∪C独立