萨伊认为下面哪一项不是生产要素?()
A.土地
B.资本
C.劳动力
D.人口
参考答案:D
______ the necklace borrowed from her friends made her_____ completely. [ ]
A. Losing; upset
B. To lose; to be upset
C. Losing; upsetting
D. lost; upset
可能是Burkitt淋巴瘤病因的病毒是()
A.KAposⅠ病毒
B.HTLV-Ⅰ
C.EB病毒
D.疱疹病毒
E.HTLV-Ⅱ