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【判断题】
合金收缩需三个阶段。其中,液态收缩和凝固收缩是铸件产生缩孔、缩松的根本原因,而固态收缩是铸件产生内应力、变形和裂纹的主要原因A.
正确
B.
错误
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举一反三
【单选题】Concerning the arteries in the neck, the wrong description is
A.
The beginning part of the external carotid artery distends to form carotid sinus
B.
Internal carotid artery enters cranial cavity to supply the brain and visual organs
C.
Usually superior thyroid artery is the first branch of external carotid artery
D.
Lingual artery lie superior to beginning point of superior thyroid artery
E.
Common carotid artery is subdivided into internal and external carotid arteries
【单选题】中国药典标定硫代硫酸钠滴定液采用
A.
三氧化二砷为基准，直接碘量法测定
B.
重铬酸钾为基准，直接碘量法测定
C.
重铬酸钾为基准，剩余碘量法测定
D.
重铬酸钾为基准，置换碘量法测定
E.
三氧化二砷为基准，置换碘量法测定
【单选题】Which of the following is NOT a distinguishing feature between larger veins and arteries?
A.
Veins have valves whereas arteries do not have valves
B.
The tunics in veins are not as clearly delimited as are the tunics in arteries
C.
The walls in veins are thinner than the walls in arteries
D.
The lumen of a vein is smaller than the lumen of an artery
E.
None. All of the above are true
【简答题】_ _ _ _ _al arteries are arteries that supply the urinary bladder.
【单选题】Concerning the renal arteries:
A.
The right renal artery is longer than the left
B.
Each gives off an inferior suprarenal artery
C.
They are enclosed in renal fascia and surrounded with perirenal fat
D.
Each separates into branches which enter the renal sinus both anterior and posterior to the renal pelvis
E.
All of the above are correct
【简答题】the arteries that take blood to the heart : ______nary arteries
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