评价柴油机抗燃性能的指标有（）和（）。
参考答案：十六烷值；柴油指数
硬膜外麻醉最危险的并发症是（）
A.神经损伤
B.全脊髓麻醉
C.硬膜外血肿
D.血压下降，心率减慢
E.硬膜外腔感染
He likes to sleep with the window ____ and the door _____ at night.[ ]
A. opened, closed
B. open, close
C. opened, close
D. open, closed
