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【单选题】
下图中晶体三极管工作在放大状态,则三极管的制造材料是( )。A.
N型
B.
P型
C.
硅
D.
锗
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举一反三
【单选题】1994年，美国教育传播与技术协会（简称AECT）出版了西尔斯（Seels）与李奇（Richey）合写的专著（ ），书中提出了教育技术的定义。
A.
《教育技术》
B.
《教育技术：领域的定义和范畴》
C.
《教育学》
D.
《基础教育》
【简答题】美国教育传播与技术协会的简写是
【单选题】What’s Dr. Siegel’s concern?
A.
The sleep disruptions will make the children weak at school.
B.
The sleep disruptions will interfere with the child's performance at school.
C.
The sleep disruptions will interfere with the child's eating habits at school.
D.
The sleep disruptions will make the children lazy at school.
【单选题】What is the main idea of this passage?
A.
Dr. Whitten and Dr. Schanze's researching experiments on disinfection.
B.
The possible way of eradicating hospital-caused infection and marine-dirt alike.
C.
The history and development of antiseptics.
D.
The process and principle of killing bacteria.
【单选题】Woman: What do you think of Dr. White's chemistry class?Man: Now there's a teacher who knows her subject!Question: What does the man mean?
A.
Dr. White teaches many different subjects.
B.
He knows Dr. White very well.
C.
Dr. White is very knowledgeable about chemistry.
D.
He doesn't know what subject Dr. White teaches.
【单选题】What's the reason for Dr. Jeol Hiderbrand's interest in chemistry?
A.
His chemistry teacher was a great teacher.
B.
His parents taught him chemistry when he was very young.
C.
He was born in a time young people had greater freedom to decide what they wanted to do.
D.
His talents were greater than his chemistry teacher.
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