问题
单项选择题
阀门检修时,增加或更换填料时,填料圈的接缝以()为宜。
A、30°
B、45°
C、60°
D、90°
答案
参考答案:B
阀门检修时,增加或更换填料时,填料圈的接缝以()为宜。
A、30°
B、45°
C、60°
D、90°
参考答案:B
选择单词或词组,用其适当的形式填空,使句子意思正确,通顺。(每词限用一次,其中两词多余)(5分)
小题1:I’m no more a child, don’t _______________ about my health. 小题2:I’ll try my _______________to make progress. 小题3:They haven’t _______________ so much for a long time. 小题4:Grace was _______________ you when I came here minutes ago. 小题5:Remember to put what we have learnt into _______________. |