【判断题】一般来说系统具有的能量越大、存在的危险物质越多,其潜在危险性就越大。
【单选题】Sometimes the student may be asked to write about his ______ to a certain book or article that has some bearing on the subject being studied.
【简答题】验证由二元方程确定的隐函数y=y(x)是否为所给微分方程的解: (1)(x-2y)y'=2x-y, x 2 -xy+y 2 =C; (3)(xy-x)y"+xy' 2 +yy'-2y'=0, y=ln(xy).
【单选题】计征个人所得税时,保险营销员的佣金中的展业成本的比例暂定为( )。