新生儿出血症是由哪种凝血因子缺乏所致( )
A．Ⅶ、Ⅷ、Ⅸ、ⅪB．Ⅴ、Ⅶ、Ⅷ、ⅨC．Ⅱ、Ⅶ、Ⅸ、ⅩD．Ⅱ、Ⅶ、Ⅸ、ⅪE．Ⅱ、Ⅴ、Ⅶ、Ⅸ
参考答案：C
Can you think of a situation _____ people communicate only by means of body language? [ ]
A. that
B. which
C. where
D. when
运行中的汽轮机油若需要补充新油品时，应注意什么？
