下列关于焊接步骤的操作叙述错误的是() A. 加热焊件时焊接一个锡点的时间限制在 4 秒最为合适。焊接时烙铁头与印制电路板成 45° 角,电烙铁头顶住焊盘和元器件引脚,然后给元器件引脚和焊盘均匀预热。 B. 焊锡丝元器件脚和烙铁接触面处引入,焊锡丝在元器件脚与烙铁头之间。 C. 当焊锡丝熔化,焊锡散满整个焊盘时,可以 45°角方向拿开焊锡丝。 D. 焊锡丝拿开后,烙铁继续放在焊盘上持续 1~2 秒,迅速或用力往上挑,以免溅落锡珠、 锡点、或使焊锡点拉尖等。
【判断题】Part 3 True or False (3*10'=30') 将" 痛苦纠聚心中,眉心发烫发热,胸口郁闷难展"翻译为 "A strong feeling of pain was full of her heart, with something burning between her eyebrows and her chest depressed."从语义忠实、表达通顺角度上说是可以接受的译...
【判断题】将 “痛苦纠聚心中,眉心发烫发热,胸口郁闷难展,胃里一股气冲喉而上。”翻译成“Pain was accumulating in her heart, she felt very hot in her eyebrows, a puff of air from her stomach came to her throat, making her choked with great depression...