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【单选题】
为降低油耗需考察3个二水平因子，相应的因子水平表如下： 因子 1水平 2水平 A供油提前角 170 190 B喷油嘴 三 二 C汽缸垫厚度 1．6 2．O 则第3号试验条件为（ ）。A.
供油提前角为17°，喷油嘴为三，汽缸垫厚度为1．6
B.
供油提前角为19°，喷油嘴为二，汽缸垫厚度为1．6
C.
供油提前角为17°，喷油嘴为二，汽缸垫厚度为2．0
D.
供油提前角为19°，喷油嘴为三，汽缸垫厚度为2．0
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举一反三
【单选题】Tim Berners Lee invented World Wide Web in 1991, which _____ everyone to use the Internet
A.
allowed
B.
afforded
C.
managed
D.
left
【单选题】What is the first thing Tim Berners-Lee has to do before establishing the smarter Web?
A.
To set up standards for all Internet users.
B.
To add descriptive tags or 'metadata'.
C.
To find the proper methods for the Web.
D.
To relate to metadata from various Web sites.
【单选题】胚胎期易于诱导免疫耐受,其原因是
A.
免疫系统处于免疫抑制状态
B.
免疫系统处于异常活跃状态
C.
免疫系统尚未发育成熟
D.
具有从母体获得的IgG抗体
E.
具有从母体获得的IgA抗体
【单选题】胚胎期易于诱导免疫耐受,其原因是
A.
免疫系统处于免疫抑制状态
B.
免疫系统处于异常活跃状态
C.
免疫系统尚未发育成熟
D.
具有从母体获得的IgG抗体
E.
免疫系统已发育成熟
【单选题】临床上常使用生理盐水的规格是0.5L，生理盐水中含有氯化钠(NaCl)4.5克，生理盐水的质量浓度是
A.
0.11g/L
B.
1.1 g/L
C.
9 g/L
D.
0.9 g/L
【单选题】World Wide Web was invented in 1991 by English scientist ,Tim Burners-lee.
A.
/; an
B.
The; an
C.
The; the
D.
A; the
【简答题】On Christmas Day 1990, in a laboratory in Switzerland, British physicist Tim Berners-Lee finished developing the tools to create the World Wide Web. He was working at the European Organization for Nuc...
【简答题】Tim Berners-Lee is the man who wrote the software(软件)programme that led to the foundation of the World Wide Web. Britain played an important part in developing the first generation of computers. The p...
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