在“用托盘天平称物体质量”的实验中，下列操作错误的是（　　）

完形填空。

     Jean is an English girl. She lives in Beijing 1 her parents. She doesn't know Chinese very 2. But she 3 very hard. She often speaks 4 in class and after class. Sometimes her classmates don't understand her 5 she can't speak Chinese well.

    It's Sunday morning. Jean wants to 6 some flowers, but she doesn't know the 7 to the flower shop. She asks a Chinese boy for help. The boy can't 8 her. Then she takes out a pen and a piece of paper and draws a 9 of a shop and some flowers. The boy looks at it and then 10 her the way.

把求n!的程序补充完整．

____ “n=”；n

i=

s=1

____ i＜=n

s=s*i

i=i+1

____ 

PRINT s

END．

$\frac{0.7}{x}=\frac{0.04}{4.8}$

则x=____