矩形波交流弧焊电源是利用半导体控制技术来获得矩形波交流电流的。
参考答案:对
I was________nervous when I gave the speech in public that I forgot everything I wanted to say in the
first few minutes. [ ]
A. such
B. too
C. very
D. so
“新马泰”旅游路线备受人们青睐。下列国家中,不属于该热线的是[ ]
A、新加坡
B、马来西亚
C、新西兰
D、泰国