由f(x)=x+1x=0,即x2+1x=0,显然方程无解.
故函数f(x)的零点个数为0个.
故答案为:0.
. It was an agreement ________ could not be changed.
A.of which details
B.whose the details
C.the details of which
D.all whose details
女性,36岁,主诉头晕、乏力、3年来月经量多,浅表淋巴结及肝、脾无肿大,血红蛋白58g/L,白细胞8.0×109/L,血小板185×109/L,血片可见红细胞中心淡染区扩大,网织红细胞计数0.005
寻找病因,应首选的检查是().
A.放射性核素骨扫描
B.妇科检查
C.51Cr红细胞半寿命期测定
D.钡剂灌肠
E.胸部X线检查