Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is()
A. entirely constant pressure
B. entirely constant temperature
C. a combination of constant volume and constant pressure
D. a combination of constant temperature and constant pressure
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患者,女性,57岁,高血压病。护士为其测量血压时发现测得血压值偏低,分析其原因可能是()。
A. 被测者在进餐后立即测量血压
B. 测量时,放气速度太慢
C. 缠袖带过紧
D. 血压计位置远低于心脏水平
E. 用宽12cm袖带测下肢血压
一个IP地址可以对应多个域名。
A. 正确
B. 错误