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【简答题】
天线两臂总长2l=λ的对称振子叫做 （全波/半波）对称天线。 A. 全波
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【单选题】Space-Age Archeology It's a strange partnership, but a very effective one: Satellites and space-shuttle-carried radar are helping archeologists. How? By 'seeing' through sand or through treetops to lo...
A.
a new stretch of the Sahara desert.
B.
traces of ancient riverbeds under the Sahara Desert.
C.
some traditional archeological tools in the Sahara Desert.
D.
a mountain beneath the Sahara Desert.
【单选题】According to Paragraph 1, which of the following statements about archeology and other branches of anthropology is true?
A.
Archeology and other branches of anthropology are totally different.
B.
Archeology is more closely related to human behavior. research.
C.
Their difference mainly lies in their different research materials.
D.
They have the same research areas about human behavior.
【单选题】小儿1岁未接种过卡介苗,PPD阳性则提示
A.
近2～3周内感染结核
B.
体内已有免疫力，不会再感染结核
C.
体内有活动结核
D.
受过结核菌感染，不一定有活动结核
E.
对结核无免疫力，不一定有活动结核
【单选题】Space-Age Archeology It's a strange partnership, but a very effective one: Satellites and space-shuttle-carried radar are helping archeologists. How? By 'seeing' through sand or through treetops to lo...
A.
a new stretch of the Sahara desert
B.
traces of ancient riverbeds under the Sahara Desert
C.
some traditional archeological tools in the Sahara Desert
D.
a mountain beneath the Sahara Desert
【简答题】指令字长决定于 ______、_______和操作数地址的个数。
【单选题】Why did the governments of America and the Soviet Union fund the study of nuclear physics rather than underwater archeology?
A.
Because they assumed that studying underwater archeology was not profitable
B.
Because they assumed that studying nuclear physics would enable them to develop nuclear weapons that could help win wars.
C.
Because they assumed that studying unclear physics would be beneficial in terms of producing electricity.
【单选题】Why does the author compare archeology to doing a jigsaw puzzle?
A.
To indicate what archeology contributes to us.
B.
To show how difficult doing archeology is.
C.
To explain the challenge and charm of archeology.
D.
To display how people do archeology research.
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