同时配置了enable password和enable secret密码，以下（）密码有效
A. enable password有效
B. enable secret有效
C. 两种密码都有效
D. 两种密码都无效
Which of the followings is true according to the principles of the writing of invitation letter（）
An informal invitation letter can be written either in the first person or in the third person
B. Contents of an invitation letter should always include the purpose of the invitation, the place and the time of the event
C. The tone of formal invitation letter tends to be oral, conversational, and friendly
D. In invitation letter, it must be avoided to use the abbreviation form such as “I’m”, “I’ve”, “We’re”, “You’re”, etc
Which of the following is not concerned with plasma colloid osmotic pressure decrease（）
A. Cirrhosis
B. Severe malnutrition （dystrophy）
C. Anemia
D. Malignant tumor
E. Nephrotic syndrome
The main mechanism of facial edema in patients with nephrotic syndrome is（）
A. Increased capillary hydrostatic pressure
B. Increased capillary permeability
C. Decreased plasma colloid osmotic pressure and loose local tissue structure
D. Obstruction of lung lymphatic return
E. Decreased GFR
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