Would you like to ___________ (participate) in our football club?
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Last Saturday they ______________ (stay up late) and filled out some paperwork.
The sun is ____________(emerge) from behind the clouds.
Tour prices are being ______(discount) as much as 20%.
如果企业的固定财务费用为0，则企业财务杠杆系数（）
A. 等于0
B. 等于1
C. 大于1
D. 小于1
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