学习了，汉语拼音后再看英语，对英语字母的发音和语法学习会起干扰作用。这种现象称为（）
参考答案：负迁移
Despite their______of interest, Fleming kept trying to develop chemical ______ it would be safe and effective.
A．lack, so as to
B．lacking, so as to
C．lack, so that
D．lacking, so that
6135型系列柴油发动机传动齿轮齿隙应为（）。
A、0.13～0.37mm
B、0.08～0.35mm
C、0.12～0.35mm
D、0.35～0.40mm
