一般把（）时期的外交称为“金元外交”。
A.罗斯福
B.杜鲁门
C.艾森豪威尔
D.塔夫脱
参考答案：D
English in many countries. But Chinese their own language. [ ]
A. is spoken; speaks
B. speaks; is spoken
C. is spoken; speak
被辐射物的热量与放射物的距离的（）成反比.
A.平方
B.立方
C.四次方
