下列哪项不是皮肤日晒黑化的影响:()
A、紫外线波长
B、辐射强度和照射试剂量
C、皮肤的光生物类型
D、神经因素
参考答案:D
Tom was so wild about computer games that he would stay online for ten hours _____every day.
A.in the end
B.in particular
C.on end
D.on purpose
莫斯科保卫战