【单选题】珍珠球球拍总长( )厘米,珍珠球的重量( )克。
【单选题】In the 1950s, "The Icebraker Mission" was from ____.
【单选题】It can be inferred from the passage that in 1950s,______.
A.
children from aboriginal families can not go to the same school with other children
B.
aboriginal children have to leave their own families when they reach a certain age
C.
aboriginal children can not visit white families
D.
all the aboriginal people have no rights at all
【单选题】The habit-formation theory originates from the ______ and was popular in the 1950s and 60s.
C.
behaviourist psychology
【简答题】数据访问页按其用途可分为3种类型:(__)、(__)、(__)。
【简答题】牵引电动机常用的导电材料有()、()、()。