()不能用作数字中继线。A、双绞线 B、75欧同轴电缆 C、120欧电缆 D、网线

题型:单项选择题

问题:

()不能用作数字中继线。

A、双绞线

B、75欧同轴电缆

C、120欧电缆

D、网线

考点:民航电信人员执照考试民航电信人员通信专业(综合练习)民航电信人员通信专业(综合练习)题库
题型:单项选择题

阅读理解

Peter: Look, it's Tom's family photo.

Jim: Is this his sister?

Peter: I don't know. Tom, is this your sister?

Tom: Yes, it's my older sister. Her name is Linda.

Jim: How about this woman?  Is she your mother?

Tom: No, she is my aunt. Her name is Carol. Those are my parents. My father Frank is a doctor and my

mother Sarah is a professor(教授).

Peter: Who's this baby then?

Tom: It's my cousin. She is Allen and Carol's daughter. Her name is Victoria. She is only 3 years old.

Jim: She is so cute. These two people are your grandparents, aren't they?

Tom: Yes, they are. They are both teachers. Their students call them Mr and Mrs Green.

l. Allen is Tom's________.                                                                                              

A. father            

B. uncle              

C. aunt

2. Linda is Victoria's ________.

A. cousin            

B. sister              

C. brother

3. Sarah is a _________.

A. doctor            

B. professor          

C. teacher

4. Frank has_________children.

A. one              

B. two              

C. three

5. Tom's grandfather is a_________.

A. doctor          

B. professor          

C. teacher

题型:单项选择题

下面有关植物与环境关系的叙述,正确的是

A.土壤对植物的生长没有影响

B.气候是决定植物分布的最重要因素

C.热带雨林地区植物具有发达的根系、叶片小、硬叶林面覆盖蜡层

D.碱蓬适宜在红壤与紫色土地区生长

题型:单项选择题

大量细菌毒素入血,导致实质细胞变性、坏死及全身中毒症状的称()

A.菌血症

B.毒血症

C.败血症

D.白血病

E.脓毒血症

题型:单项选择题

男,50岁,高血压病多年,近日活动后出现呼吸困难伴左胸痛,咳嗽频繁,咳出为粉红色泡沫样血痰,可能的疾病为()

A.大叶性肺炎

B.急性左心衰

C.右心衰竭

D.支气管扩张

E.自发性气胸

题型:单项选择题

简述居住区绿地的作用。

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