【判断题】齿轮传动的传动比是两轮转速之比,也是两轮齿数之比。
【判断题】齿轮传动的传动比是主动齿轮转速与从动齿轮转速之比,也等于两齿轮齿数之比
【单选题】Which of the following statements concerning the blood supply to the heart is incorrect?
A.
The coronary arteries are branches of the ascending aorta.
B.
The right coronary artery supplies both the right atrium and the right ventricle.
C.
The circumflex branch of the left coronary artery descends in the anterior interventricular groove and passes around the apex of the heart.
D.
Arrhythmias (abnormal heart beats) can occur after occlusion of a coronary artery.
E.
Coronary arteries can be classified as functional end arteries.
【单选题】我国尊重和保障人权,应该做到( ) (1)加强法治宣传教育。(2)弘扬社会主义法治精神。(3)建设社会主义法治文化。(4)增强全民法治观念,形成全民守法的氛围和习惯
【判断题】齿轮传动的传动比是主动齿轮转速与从动齿轮转速之反比,也等于两齿轮齿数之比。
【单选题】Concerning the heart the right description is
A.
Two thirds of the heart lie in the right side of anterior median line
B.
Inferior vena cava drain to left atrium
C.
Pulmonary valve looks like semilunar
D.
Right ventricle gives rise to pulmonary trunk
E.
Pulmonary vein drain into right atrium