题目内容

截至1995年,全世界已有38个国家批准了()种辐照食品,我国批准了()种辐照食品。

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当现场硫化氢报警仪发出二级报警,硫化氢含量达到多少时应立即佩戴正压式呼吸器?

阅读《寡人之于国也》的段落,回答问题。 五亩之宅,树之以桑,五十者可以衣帛矣;鸡豚狗彘之畜,无失其时,七十者可以食肉矣;百亩之田,无夺其时,数口之家,可以无饥矣;谨庠序之教,申之以孝悌之义,颁白者不负戴于道路矣。七十者衣帛食肉,黎民不饥不寒,然而不王者,未之有也。这段文字采用了什么论证方式?

Examine the following commands executed in your database: SQL> ALTER SESSION RECYCLEBIN=ON; Session altered SQL > CREATE TABLE emp TABLESPACE tbsfd AS SELECT * FROM hr.employees; Table created. Further, you executed the following command to drop the table: SQL> DROP TABLE emp;Table dropped. What happens in this scenario?()

A. The table is moved to the SYSAUX tablespace.
B. The table is moved to the SYSTEM tablespace.
C. The table is removed from the database permanently.
D. The table is renamed and remains in the TBSFD tablespace.

三相交流电磁机构运行时可以不安装短路环。

A. 正确
B. 错误

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