【单选题】You _____ if you had spoken the truth out. But you were as quiet as a mouse. [ ]
A.
mustn't have been blamed
C.
wouldn't have been blamed
【单选题】If you had spoken clearly, you ______.
C.
would have been understood
【简答题】求下列函数的微分: (1)y=a cos3x (a>0); (2)y=(1+x 2 ) xesx
【简答题】9-1 上面(5)、(6)求偏导数 5. 求下列函数的定义域: 9-2 求下列函数的偏导数:(5) 9.验证: 9-3 求下列函数的全微分:
【简答题】求下列函数的微分 (1) (2) (3)设y=y(x)满足方程xy-e x +e y =0,求dy
【单选题】If you had spoken clearly, you _______.
A.
would have been understood
【单选题】If you had spoken more clearly, you______.
C.
would have been understood
【简答题】求下列函数的微分: (1) (2) (3) (4)
【单选题】298K时,反应Zn+Sn4+= Sn2+(1.0mol·dm-3)+Zn2+(1.0mol·dm-3)组装成原电池,测得电动势为0,则c(Sn4+)应为()mol·dm-3(已知jϴ(Zn2+/Zn) = -0.76V,jϴ(Sn4+/Sn2+) = 0.15V)
【单选题】If you had spoken clearly, you would ______ .