治疗疼痛常用的药物有()
A．麻醉性药物及类麻醉性药物
B．神经安定药
C．副交感神经阻滞剂
D．维生素类药物
E．抗凝血剂
参考答案：A, B, C
在地面天气图上，等压线越密集，说明气压梯度（）。
A.越大
B.越小
C.不能确定
A vessel has an amidships superstructure. Which location would be most suitable for ondeck stowage of automobiles?（）.
A.On top of No.1 hatch
B.Beside the hatches, forward of the midships house
C.On top of the hatch immediately forward of the midships house
D.On top of the hatch immediately aft of the midships house
