对大量钢筋除锈可采取人工用钢丝刷或砂轮等方法进行。( )
参考答案：错
During the reading lesson, the teacher asked students to read a few ______ from the novel.
A．pieces
B．essays
C．fragments
D．extracts
如何进行示波器的幅度校正和扫描时间校正？
