以发动机曲轴输出功率为基础的发动机动力性和经济性指标，称为发动机性能的（）。
A.平均指标
B.指示指标
C.指示扭矩
参考答案：A
阅读短文，判断正误，正确的写“T”，错误的写“F”。
Jim Green is a student at No. 14 Middle school. He has classes from Monday to Friday. He has many
things to do after class. On Monday and Wednesday he helps his friends with their English. On Tuesday
he makes modle planes. On Friday afternoon, he plays basketball. He goes to the park with his parents and
sister on Saturday. On Sunday, he has a good rest at home and does his homework.
( )1．Jim has classes from Monday to Saturday.
( )2．Jim helps his friends with their English after class on Monday and Wednesday.
( )3．Jim plays basketball on Saturday afternoon.
( )4．Jim helps his sister with her homework on Wednesday.
( )5．Jim has a good rest at home on Sunday.
( )是无民事行为能力人、限制民事行为能力人的法定代理人。
A．父母 B．监护人 C．配偶 D．子女
