【单选题】截止2017底,我国电梯整梯制造企业( ) 余家,年产电梯 81 万台。
【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
【判断题】青霉素和头饱菌素分子要经酸水解后方可用碘量法测定。()
【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
【单选题】所有校车、( )和半挂牵引车应安装符合GB/T 13594规定的防抱死制动装置。
【单选题】关于直接碘量法和间接碘量法,下列叙述正确的是
A.
直接碘量法和间接碘量法都用于还原性物质的测定。
B.
直接碘量法和间接碘量法都用于氧化性物质的测定。
C.
直接碘量法用于氧化性物质的测定,间接碘量法用于还原性物质的测定。
D.
直接碘量法用于还原性物质的测定,间接碘量法用于氧化性物质的测定。
【判断题】车长大于9m的公路客车、旅游客车和未设置乘客站立区的公共汽车,所有专用校车、危险货物运输车和半挂牵引车,总质量大于等于12000kg的货车和专项作业车及总质量大于10000kg的挂车应安装符合GB/T13594规定的防抱死制动装置。
【判断题】青霉素可用碘量法测定含量,是由于青霉素分子消耗碘。()