【单选题】How is the question of race in relation to marriage similar to the question of money?
A.
They fuel mutual instinctual attraction.
B.
They inspire individual responsibilities.
C.
They deflect superficial relationships.
D.
They prohibit suitable marriages.
【单选题】() it is true remains a question.
【简答题】次生腭 secondary palate
【简答题】目前较常用的短距离微功率无线电通信使用()和()频段。
【单选题】—_________ boys are there in your class, Tom? —20. [ ]