船用VHF设备共划分成()频道A.88 B.57 C.28 D.70

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问题:

船用VHF设备共划分成()频道

A.88

B.57

C.28

D.70

考点:船舶GMDSS证书考试GMDSS系统概述GMDSS系统概述题库
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Dear Mrs Zhou,
We have been very good boys and girls since you went to hospital.Don’t worry about us.But we miss you a lot.Please get well soon and come back.
Your students,
Class Three
Dear Cathy,
All the best wishes for your sweet sixteenth birthday.
Have fun in the party.
Judy
Dear Mom and Dad,
This is going to be a white Christmas because it has snowed heavily here in New York.Betty invited me to her party this year.It will surely be great fun!
Love,David
Dear Johnson and Maria,
How is the new place?I started to miss you the day you left.Are you going to have a house warming party? Don’t forget us!
Your old friends,
The Browns
小题1:What does Mrs. Zhou do?
A.A doctor.B.A actress.C.A teacher.D.A student.
小题2:Who will join Betty’s party?
A.Cathy.B.David.C.Maria and Johnson.D.David’s mom and dad.
小题3:What can we learn from the cards?
A.Mrs.Zhou was ill and has been back from hospital.
B.Judy is sixteen years old.
C.There are at least six people in the Browns’ family.
D.It must be winter now in New York.
题型:单项选择题

牙周检查中探诊是最主要的手段。

通过探诊显示最有意义的指标是

A.牙周袋的深度

B.探及龈下牙石

C.袋内溢脓

D.附着水平

E.牙龈退缩

题型:单项选择题

血液中O2存在的主要结合形式是()

A.HbO

B.HbO2

C.HO2-O2

D.HbO3

E.氨基甲酸血红蛋白

题型:单项选择题

左心衰竭可出现()。

A.突然胸痛,呼吸困难伴休克

B.颈静脉怒张,肝大,下肢水肿

C.夜间阵发性呼吸困难伴发绀

D.胸痛、出汗伴呼吸困难

E.颈静脉怒张,脉压变小

题型:单项选择题

怎样避免或减轻预热器的低温腐蚀?

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