在有瓦斯或煤尘爆炸危险的煤层中爆破时,必须采用正向爆破。
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我国修订后的现行刑法开始施行的时间1997年7月1日。()
处理撞击引爆盲炮时,应平稳提升管柱。当弹体提升到距井口还有四根管柱长度时,由现场技术人员指导拆卸弹体。
Write the verbs in the correct form. of the Present Simple.(用括号中所给动词的一般现在时形式填空。)
Alex 1_________ (be) 21 years old.He 2_________ (live) in the South of Italy, in a small city called Lecce and he 3_________ (work) in a bank.He’s got one brother but he 4_________ (have not got) any sisters.His parents 5_________ (be) doctors.He 6_________ (get up) at half past seven every day, 7_________ (have) a shower, gets dressed and walks to work.He 8_________ (not go) to work on Saturdays or Sundays.
不准装过漂白粉的空桶放在厂房内。撒落在地面上的漂白粉应立即清除干净。