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【单选题】
对于生产函数Q=f(L,K)和成本方程C=wL+rK来说,在最优的生产要素组合上应该有A.
等产量线和等成本线相切
B.
MRTSLK=w/r
C.
MPL/w=MPK/r
D.
以上都对
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【单选题】下图为8位并联的共阳极七段数码管,如果段选线a~dp依次接P2.0~P2.7,请问当前P2口送出的字节为( )
A.
0x49
B.
0x92
C.
0x29
D.
0x94
【简答题】标准直齿圆柱齿轮的模数是 3 ,齿数为 12 时,齿顶圆直径为(
) mm 。(填写阿拉伯数字)
【单选题】下图为8位并联的共阳极七段数码管,如果位选线1~8依次接P2.0~P2.7,请问当前P2口送出的位码为( )
A.
0x40
B.
0x04
C.
0x20
D.
0x02
【简答题】中国传统建筑的屋顶有6种形式数量最多,也最为重要,主要有 、 、 、 、 、 。
【单选题】Now decide which of the following statements best sums up the main idea. Put a tick by it.
A.
Some of his family members were pleased while others were not when the writer tried to please everybody in the family on New Year’s Day.
B.
The writer tried to be a better husband and a better father in the new year, and his family members appreciated this.
C.
The writer carried out his New Year’s resolutions faithfully to improve himself, but the results all went contrary to his expectations.
【单选题】Choose the second half of the sentence from the options below. Please put tick in the ...
A.
''dry-cleaning'' column
B.
laundry bag
C.
out the laundry list
D.
express laundry service
【简答题】已知两外啮合标准直齿圆柱齿轮，模数为3，小齿轮齿数为20，大齿轮为30，则中心距为____mm。
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