(7分) 一道选择题共有A、B、C、D四个备选答案, (1)如果其中只有一个是正

题型:解答题

问题:

(7分)

一道选择题共有A、B、C、D四个备选答案,

(1)如果其中只有一个是正确的,某位同学随意选了其中一个答案,他选中正确答案的概率是多少?                                

(2)如果其中有两个是正确的,某位同学随意选了其中两个答案,他选中正确答案的概率是多少?

考点:概率的意义随机事件必然事件列举法求概率
题型:解答题

()为建设三级电力市场体系提供了体制环境.

A.电力市场体系建设

B.电网建设

C.电力体制

D.电力体制改革

题型:解答题
(A=Kangkang   B=Dad   C=Mom)
A: Dad, could you come and help me?
B: Sure, dear. What is it?
A: I don’t understand the meaning of “interpreter”.
B:  小题1:
A: But I left my dictionary at school.
B:   小题2: 
A: Thanks, Dad, I will. Mom,  小题3: 
C: This word “interpreter” means a person who helps foreigners to translate the language and explain the culture of the country.
A: I see.   小题4: I want to help businessmen all over the world and help them know China.
C: Good idea.   小题5: 
A.What are you doing?
B.I want to be an interpreter when I grow up.
C.You may go and ask your mother for help.
D.You are good at English.
E.Oh, dear, you can look it up in your dictionary.
F.But you must study English harder than before.
G.what does “interpreter” mean in English?
题型:解答题

男,38岁,外院诊断“血吸虫病”患者,曾用锑剂治疗1次,1年前用吡喹酮治疗1次。近1个月来乏力、腹胀,刷牙易出血。查体:慢性病容,巩膜无明显黄染,腹水征(+),肝未及,脾肋下3.5cm。血象:Hb 98g/L,WBC3.8×109/L,N 66%,L 34%,PLT 48×109/L。对于患者的诊断和治疗最有指导意义的检查是()

A.粪便直接涂片

B.直肠黏膜活检

C.粪便孵卵法

D.环卵沉淀试验

E.皮内试验

题型:解答题

在下列四项中,不属于OSl(开放系统互连)参考模型7个层次的是______。

A.

会话层

B.

数据链路层

C.

用户层 0)应用层

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