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【单选题】
某患者既往肾小球肾炎史,因病情稳定上班工作。今日,在单位体检时发现血压升高,来医院复查,证实为慢性肾小球肾炎急性发作。为迅速而有效地缓解症状,下列哪项措施最佳()A.
低盐饮食
B.
卧床休息
C.
激素疗法
D.
利尿降压
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举一反三
【单选题】—What did John say? —He told me that he_________ a cold for three days. [ ]
A.
has caught
B.
had caught
C.
has had
D.
had had
【单选题】John has caught a bad cold. _______
A.
It’s too bad
B.
I don’t mention it
C.
I’m sorry to hear that
D.
Take it easy
【简答题】图示回路，溢流阀的调整压力为5MPa，顺序阀的调整压力为3MPa，问下列情况时A、B点的压力各为多少？ 液压缸活塞杆伸出时，负载压力P L =1MPa时；
【单选题】With his hard work, John ____ the basic knowledge of computer.A. has caught B. has acquired C. has required D. has acknowledged
A.
has caught
B.
has acquired
C.
has required
D.
has acknowledged
【简答题】图示回路，溢流阀的调整压力为5MPa，顺序阀的调整压力为3MPa，问下列情况时A、B点的压力各为多少？ 液压缸活塞杆伸出时，负载压力P L =4MPa时；
【单选题】John caught a cold on Saturday and ______ in bed ever since. [ ]
A.
was
B.
has been
C.
is
D.
have been
【简答题】John has never been on time, ______? A) has John B) hasn't John C) has he D) hasn't he
【简答题】图示回路，溢流阀的调整压力为5MPa，顺序阀的调整压力为3MPa，问下列情况时A、B点的压力各为多少？ 活塞运动到终点时。
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