《理发店、美容店卫生标准（GB9666—1996）》》规定，理发刀具、胡须刷、毛巾不得检出（）。
参考答案：大肠菌群和金黄色葡萄球菌
The old couple have been married for 50 years and never with each other
A．they had quarreled
B．they have quarreled
C．have they quarreled
D．had they quarreled
海警指挥机构分为（）四级。
A、部局
B、总队
C、支队
D、大队
E、舰艇
