A RADIO SIGNAL FROM A DISTRESSED VESSEL AUTOMATICALLY DIRECTED TO A RCC GIVING POSITION,IDENTIFICATION,COURSE AND SPEED OF THE VESSEL AS WELL AS THE NATURE OF DISTRESS is known as().
A. Distress alert
B. Safety alert
C. Emergency alert
D. General alert
女,35岁。右上肢疼痛,并向前臂尺侧放射,环指、小指麻木,肩上举时症状加重,右手握力减退,小鱼际肌萎缩。()
A. 颈椎病
B. 落枕
C. 肩周炎
D. 颈椎结核
E. 胸廓出口综合征
车辆由于具备轮速差速系统所以在车辆行驶中两侧车轮可以实现不同的转速,当汽车在()时,左右驱动轮的转速相同。
A. 直线行驶
B. 转弯行驶
C. 颠簸路面
D. 调头