问题
填空题
加油机内部及爆炸危险区域内的防爆电气（）进行检查，发现防爆性能不良或损坏时，立即停用，进行修复或更换，合格后方可使用。
答案
参考答案：每周
搜题请搜索小程序“爱下问搜题”
加油机内部及爆炸危险区域内的防爆电气（）进行检查，发现防爆性能不良或损坏时，立即停用，进行修复或更换，合格后方可使用。
参考答案：每周
Ann is a middle school student. She has a sister 1 a brother. They are Helen and Paul. Ann and Helen can 2 . Ann can sing and play 3 well, but Helen 4 . Helen doesn’t like playing the instruments（乐器）. She 5 chess, but she doesn’t play chess 6 Ann. Ann can’t play chess. Helen often plays with Paul, because Paul plays 7 very well. Paul can 8 play basketball well. And he is 9 the school basketball club. He often 10 other students with basketball.
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