导线穿电线管敷设时，其穿管数量不得大于电线管内径的（）。
A.30％
B.40％
C.50％
D.60％
参考答案：B
19. His family members gave some examples of ______ his drinking and smoking had affected the family.
A．that
B．what
C．how
D．Whether
为确保大项目部所辖各个项目损益的真实性和准确性，所辖项目的收入、成本、损益、债权、债务、资金等必须（）。
A.完全独立核算
B.独立核算
C.不完全独立核算
D.汇总核算
