下列哪种血液成分中含因子Ⅹ和Ⅷ（）
A.硫酸钡吸附血浆
B.正常贮存血浆
C.正常贮存血清
D.硫酸钡吸附血清
E.正常人新鲜血清
参考答案：A
下列不属于影响学前儿童攻击性行为因素的是（）。
A.榜样
B.强化
C.移情
D.挫折
The hall had no spare seats left last night. ________， the performance achieved a great success. [ ]
A．Immediately
B．Fortunately
C．Surprisingly
D．Obviously
