皮皮学,免费搜题
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搜题
【单选题】
改进型发动机气门座圈,获得更高的耐磨、耐高温、抗氧化、耐腐蚀涂层,提高燃油发动机热效率的激光技术是
A.
激光涂覆
B.
激光焊接
C.
激光热处理
D.
激光表面处理
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举一反三
【单选题】Biology is the study of living things. Which characteristic applies to all forms of life?
A.
able to move from place to place
B.
able to reproduce
C.
carry out photosynthesis
D.
possess a nervous system
【简答题】Cell biology is the study of cells and their structure, function, and _______ .
【单选题】_____________is the branch of biology involving the study of microorganisms.
A.
Microscope
B.
Microwave
C.
Microbiology
D.
Microbe
【判断题】吉利汽车购买钢材记入GDP。
A.
正确
B.
错误
【多选题】Synthetic biology is a powerful tool for the study of newly designed and synthesized biological systems with amazing novel functions. Its potential applications include:
A.
biological computers, biosensors, cell transformation
B.
designed proteins, industrial enzymes, information storage, new Materials
C.
reduced amino-acid libraries, space exploration, synthetic genetic pathways, synthetic life
D.
synthetic amino acids, synthetic nucleotides, drug design & discovery, therapeutics, cancer detection & diagnosis
【单选题】非空无向图的邻接矩阵是一个( )。
A.
上三角矩阵
B.
零矩阵
C.
对角矩阵
D.
对称矩阵
【简答题】U2P1- 1. Genetics is a very important branch of biology: the study of units of ______.
【单选题】无向图的邻接矩阵是一个( ),有向图的邻接矩阵是一个( )
A.
上三角矩阵,下三角矩阵
B.
下三角矩阵,对称矩阵
C.
上三角矩阵,对称矩阵
D.
对称矩阵,无规律
【单选题】关于结核菌素PPD试验下列操作不的是
A.
在左上臂三角肌下缘
B.
测局部硬结范围,取纵横两者平均直径判断强度
C.
48~72小时看结果
D.
皮内注射,使之形成直径6~10mm的皮丘
E.
取0.1ml制品
【单选题】关于结核菌素PPD试验下列操作不正确的是()
A.
在左上臂三角肌下缘
B.
测局部硬结范围,取纵横两者平均直径判断强度
C.
48~72小时看结果
D.
皮内注射,使之形成直径6~10mm的皮丘
E.
取0.1ml制品
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