题目内容

The river runs () here into the South China Sea.

A. broad
B. widely
C. broadly
D. wide

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钢筋电弧焊的主要设备是电焊机,电焊机可分为焊接变压器、焊接发电机和焊接整流器三大类。( )

A. 对
B. 错

将两钢筋安放成水平对接形式,并置于铜模内,中间留有少量间隙,用焊条从接头根部引弧,连续向上焊接完成的电弧焊方法是钢筋窄间隙电弧焊。( )

A. 对
B. 错

焊接整流器与直流弧焊机比较,具有噪音小、空载损耗、惯性和磁偏吹较小、制造和维护容易等特点。( )

A. 对
B. 错

Oh, the fire is getting nearer and nearer. It is ______ our children and old people.

A. dangerous on
B. dangerous to
C. dangerous for
D. dangerous with

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