申请人依照食品安全法第六十条第三款规定向承担复检工作的食品检验机构（以下称复检机构）申请复检，应当说明理由。
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The ratio of the work done by the machine（）the work done on it is called the efficiency of the machine.
A. against
B. with
C. to
D. for
硫磺回收采用二级转化Claus制硫工艺，过程气采用自产（）MPa中压蒸气加热方式。
If a unique constraint is defined on column COL1 of table TAB1, what are the characteristics of COL1?（）
A. COL1 will accept NULL values and can be referenced in another table's foreign key specification.
B. COL1 will not accept NULL values and cannot be referenced in another tables foreign key specification.
COL1 will not accept NULL values and can be referenced in another tables foreign key specification.
D. COL1 will accept NULL values and cannot be referenced in another tables foreign key specification.
1932年1月28日，爱国将领蒋光鼐，蔡廷锴率领（）奋起抵抗，发动一.二八淞沪抗战
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