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【单选题】
离心泵的轴向指将泵的转子推向（）方向的力。A.
泵的排除
B.
泵的吸入
C.
泵的上方
D.
泵的下方
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反馈参考答案：
举一反三
【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 ( )
A.
they are authentic .
B.
they are regular.
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 （ ）
A.
they are authentic
B.
they are regular
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( ).
A.
they are authentic
B.
they are regular
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( )。
A.
资金流
B.
订单信息流
C.
全球供应链资源网络
D.
计算机信息网络
【简答题】计算机控制系统中，如何用软件进行干扰的防护？
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