3号血清对应标准红细胞为-+--+-，其可能的Rh抗体为（）
A.抗-C
B.抗-D
C.抗-D、抗-C
D.抗-E
E.抗-c
参考答案：D
（）的闪点>28°C。
A、松节油
B、甲醇
C、煤油
D、汽油
E、柴油
Our headteacher gave us _____ in the library yesterday. [ ]
A. a two-hour speech
B. a two-hours speech
C. a two hour speech
D. a two hours speech
