【单选题】在船舶海洋水文气象观测中,每次观测时间应从何时开始?
【单选题】下图 受力与变形形式是轴向压缩或拉伸的是( )。
【单选题】地转偏向力只在物体相对于地面有水平运动时才产生,它只能改变水平运动物体运动的方向,不能改变物体运动的速率。读“某河流水系图”。在河流 A 处逆水行船,仅从节省动力角度考虑,船的航线应选在 ( )
【多选题】下列关于螺纹画法错误的是
A.
螺孔与螺孔或螺孔与光孔相贯时,只画大径产生的相贯线
B.
不管是内螺纹还是外螺纹,剖面线都画到牙顶(粗实线)处
C.
内螺纹牙底(小径)和螺纹终止线画粗实线,牙顶(大径)画细实线
D.
外螺纹牙顶(大径)和螺纹终止线画粗实线,牙底(小径)画细实线
【单选题】Banks are obligated to verify the documents received to see that ( )
C.
they are in the right form .
D.
they are those listed in the credit.
【单选题】In collection business, banks are obligated to check the documents received to see that ( )
C.
they are the same as those listed in the collection instruction
D.
they are in the right form
【单选题】Banks are obligated to verify the documents received to see that( ).
C.
they are those listed in the collection order
D.
they are in the right form
【单选题】大型物流企业在物流流程再造过程中都建立了 “一流三网”的物流体系统,不属于一流三网范畴的是( )。
【单选题】以下哪种技术极大提高了免疫学检测的特异性?