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【单选题】
产生周期为 1 的三角波信号,正确的代码是:A.
t=0:1/1000:5;y=sawtooth(2*pi*t,0.5);
B.
t=0:1/1000:5;y=sawtooth(2*pi*10*t,0.5);
C.
t=0:1/1000:5;y=sawtooth(10*t,0.5);
D.
t=0:1/1000:5;y=sawtooth(*t,0.5);
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举一反三
【单选题】蔡某,女性,50岁,化脓性胆管炎手术后10天,多次下肢静脉输液并发血栓性静脉炎,下列哪项措施不妥
A.
停止在患处静脉输液
B.
抬高患肢
C.
局部制动
D.
局部按摩
E.
局部硫酸镁湿热敷
【单选题】Baby-boomer parents seem to struggle with two things:saying no and ___.
A.
let go
B.
leting go
C.
let it go
D.
letting go
【简答题】Baby-boomer parents seem to struggle with two things: saying no and letting go. (Para. 9)
【单选题】Questions 3 and 4 will be based on the following news item.
A.
They don’t spend time with their baby boomer parents.
B.
They don’t like traditional restaurants, bars and cafes.
C.
They may compare the cost of their food every week.
D.
They may spend less on restaurant food than older people.
【单选题】蔡某，女，50岁，化脓性胆管炎手术后10天，多次下肢静脉输液并发血栓性静脉炎，下列哪项措施不妥
A.
停止在患处静脉输液
B.
抬高患肢
C.
局部制动
D.
局部按摩
E.
局部硫酸镁湿热敷
【简答题】Baby-boomer parents seem to struggle with two things: saying no and___________(放手). The teaching assistants massed together in the theatre were advised to send unhappy parents directly to professors. ...
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