间接带电作业工作领导人不得直接参加操作，必须在现场不间断地进行监护。
参考答案：对
15年前王老师的年龄是他女儿的7倍，15年后王老师的年龄是他女儿的2倍，问他女儿今年的年龄是多少？（）
A．10岁
B．15岁
C．21岁
D．30岁
---Can you guess the new Nike sports shoes?
---Yes. Maybe he asked his grandpa to pay for them, I think.
A．where he bought
B．how he paid for
C．when he paid for
D．why he bought
