下列气体不能做喷泉实验的是[ ]
A.NH3
B.CO2
C.HCl
D.NO
答案:D
He had no pencil to _____ because he left his pencil-box at home this morning. [ ]
A. write in
B. write
C. write with
脊髓侧索急性损伤可导致受损平面以下()
A.同侧肌肉瘫痪
B.对侧肌肉瘫痪
C.同侧腱反射永远消失
D.对侧腱反射永远消失
E.同侧痛温觉丧失