题目内容

Which signal is a call for help

A. Shouting here and there.
B. Crying twice.
C. Shouting or whistling three times together.

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It ______ me about forty minutes to do my homework every day.

A. spends
B. takes
C. uses

本病例临床诊断为

A. 寒湿痢
B. 虚寒痢
C. 休息痢
D. 久痢伤及阴血
E. 久痢脾阳虚衰

Can you guess where this passage is from

A novel (小说).
B. A newspaper.
C. A diary.

某企业内第二分厂是利润中心，本期实现内部销售收入300万元，销售变动成本为180万元，该中心负责人可控固定成本为40万元，不可控但应由该中心负担的固定成本为20万元，那么该中心的部门经理边际贡献是( )万元。

A. 120
B. 80
C. 60
D. 以上均不正确