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【单选题】
齿轮与齿条的啮合传动,齿轮齿数Z=20,模数m=2.5mm,齿轮转4圈,则齿条移动的距离为A.
100лmm
B.
200лmm
C.
400лmm
D.
800лmm
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举一反三
【简答题】称取盐酸普鲁卡因供试品 0.6210g ,用亚硝酸钠滴定液(0.1mol/L)滴定至终点时,消耗亚硝酸钠滴定液(0.1mol/L)22.67ml,已知每lml亚硝酸钠滴定液(0.1mol/L)相当于27.28mg的盐酸普鲁卡因,求本品的百分含量?
【判断题】The patient has to inform the family member of his or her health, medications and so on before surgery.
A.
正确
B.
错误
【简答题】称取盐酸普鲁卡因供试品0.6210g,用亚硝酸钠滴定液(0.1mol/L)滴定至终点时,消耗亚硝酸钠滴定液(0.1mol/L)22.67ml,已知每1ml亚硝酸钠滴定液(0.1mol/L)相当于27.28mg的盐酸普鲁卡因,求本品的百分含量?
【单选题】称取盐酸普鲁卡因供试品 0.6210g ,用 0.1001mol/L 的亚硝酸钠滴定液滴定至终点,消耗亚硝酸钠滴定液 22.67ml 。每 1ml 亚硝酸钠滴定液 (0.1mol/L) 相当于 27.28mg 的 C 13 H 20 N 2 O 2 · HCl , 求盐酸普鲁卡因的百分含量。 ( )
A.
99.0%
B.
99.7%
C.
95.6%
D.
90.5%
【多选题】国际战略格局演变的规律性体现在________
A.
既是必然的又体现偶然性
B.
是个量变到质变的过程
C.
既有渐变又有突变的方式
D.
受各国领导人影响很大,因此很不确定。
【单选题】The patient has already ________ his appointment because of the storm.
A.
reminded
B.
seen
C.
cancelled
D.
confirmed
【单选题】You are assessing a patient who has come to the emergency room with left sided abdominal pain, nausea, and vomiting. As you assess the patient further, you find he has bruising around his abdomen arou...
A.
Acute pancreatitis
B.
Acute viral hepatitis
C.
Pancreatic cancer
D.
Appendicitis
【单选题】After the nurse has finished inserting the fluid into the patient during enema procedure, how long should the nurse tell the patient to keep the fluid in his/her body?
A.
5 minutes
B.
10-15 minutes
C.
15-20 minutes
D.
As long as possible
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