按照员工的工资等级、工资标准和工作时间的长短来计算确定工资的形式叫（）
A.计时工资
B.计件工资
C.提成工资
D.外包工资
参考答案：A
阅读短文，判断下列句子的正（T）、误（F）。
I am in No. 10 Middle School. At School I have a good friend. He is an English boy. His name is Tom. He is twelve. We are not in the same class. He is Class 4, Grade 7. I am in Class 2. Tom's sister is not a student. Her name is Jane. She is five. She is a nice girl.
( )1. My friend Tom is from America.
( )2. We are not in the same class. He is in Class 2. I am in Class 4.
( )3. Tom has a sister.
( )4. Tom and his sister are students.
( )5. Tom and I are in No.10 Middle school.
2008年北京市老年人口的男女性别比为（）
A．0.574:1
B．0.823:1
C．0.919:1
D．1.044:1
sister are students.
