能否做到发展生产力是衡量是不是真心实践“三个代表”思想最重要的标志。 ( )
参考答案：错
I told him the news _____ be came back yesterday. [ ]
A. until
B. as soon as
C. unless
不准用（）代替压缩空气吹扫工作服和吹除乙炔管道内的堵塞物。
