填空题 A
填空题. A. Was it serious? B. Did you see the doctor? C. Are you feeling better now? D. How are you? E. Take more exercise and keep healthy. F. What's wrong with you? G. I miss you so much. H. You are so strong. A: Hi, Fang Fang. You were not at school yesterday. 1 B: Oh, I had a headache and I had to ask for a sick leave. A: Sorry to hear that. 2 B: Yes, my mother took me to the hospital. The doctor looked me over and said I had caught a cold. A: 3 B: Yes, a little. The doct
设y=x(x+1)(x+3)(x+5)(x+7)+x10+e10，则y(10)=______无
已知点(5，2)为函数的极值点，则a，b分别为______无
脓性白带镜检时主要观察______
曲线______无
求方程y〞-2y＇+5y=ex的通解．
直线l与x轴平行，且与曲线y=x-ex相切，则切点的坐标为 。
计算
设函数
z=(1-x)2+(2-y)2的驻点是______．
______ A． B． C． D．
x=0是函数的______无
等于______。 A．0 B． C．1 D．
对于微分方程y"+4y'+4y=e-2x，利用待定系数法求其特解y*时
设函数f(x)=2x+ln(3x+2)，求f"(0)．
设f(x，y)=，则=______ A． B． C． D．
表示______
设
若cosx是f(x)的一个原函数，则∫xf'(x)dx等于______