管子与法兰对接时密封管线的法兰螺栓孔对称水平度偏差为()。
参考答案:±1mm
按要求写句子。
1. I like PE.(改为否定句)
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2. He cannot do exercise well. (改为肯定句)
3. Nancy has seven lessons every day.(对画线部分提问)
4. Mike jumps high.(改为一般疑问句)
5. My sister dances beautifully.(改为一般疑问句)
6. There are many computers in the reading room.(写出同义句)
7. Do you take photos on Sundays?(用Su Yang作主语改写句子)
实行集中目标市场营销策略的优点是( )。
A.总销售量会增加 B.营销稳定性好C.易于管理,成本低 D.易树立企业优越形象