插头各端子和露出的不带电金属部分的绝缘电阻，电饭锅必须在（）MΩ以上，洗衣机要在2MΩ以上。

A.2；

B.3；

C.4；

D.1.

Which of the following would be most important to teach a client older than 65 years to prevent a recurrence of bacterial pneumonia（）

A. Change current diet habits.

B. Seek prompt antibiotic therapy for viral infections.

C. Receive prophylactic antibiotic therapy.

D. Obtain annual influenza and pneumococcal vaccines.