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【单选题】
高速重载齿轮传动中,当散热条件不良时,齿轮的主要失效形式是 ( ) 。A.
轮齿折断
B.
齿面点蚀
C.
齿面磨损
D.
齿面胶合
E.
齿面塑性变形
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举一反三
【单选题】分析下面程序的执行结果。 #include void main() { char *s= " China " ; printf( " %s , %c, %s, %c \n " ,s , *s, s+ 3 , s[ 3 ] ); }
A.
China,C,na,n
B.
China,C,a,n
C.
C,China,n,na
D.
China,China,na,na
【单选题】The formula which breaks down the return on equity into three component parts is referred to as which one of the following?
A.
equity equation
B.
profitability determinant
C.
Du Pont identity
D.
equity performance formula
【单选题】The net present value formula for one period is
A.
NPV = C 0 + [ C 1 /(1 + r )].
B.
NPV = PV required investment.
C.
NPV = C 0 / C 1 .
D.
NPV = C 1 / C 0 .
【单选题】Which one of the following is the formula that explains the relationship between the expected return on a security and the level of that security's systematic risk?
A.
time value of money equation
B.
unsystematic risk equation
C.
expected risk formula
D.
capital asset pricing model
【简答题】#include int main( ) { char *s[3] ,t[3][20]= {"I", "LOVE", "CHINA."}; s[1]=t[1]; printf("%s ", s[1]); return 0; }输出()
【简答题】下列哪一项不是导致赤潮发生的环境因素? A、农业生产废水 B、工业废水 C、冷却水 D、生活废水
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