show+sb+round

钟汤娇2149supposed sb+(to be)+adj./n是什么意思 -
段巧骆18451605070 ______ 1)suppose sb to do 认为(期望,希望)某人做某事I suppose you to clean the room.2)suppose sb +to be adj/n. 猜测某人怎样 I suppose you to be twenty.我猜你二十岁.

钟汤娇2149It's+形容词+for sb+动词不定式,是什么语法结构??? -
段巧骆18451605070 ______ it是形容词主语,动词不定式是真正的主语,故也可写成:动词不定式 +BE +形容词+for sb . 如It 's important for us to learn English well .= To learn English well is very important for us .

钟汤娇2149It's+adj.+of sb+to do sth是什么意思? -
段巧骆18451605070 ______ 这是动词不定式的复合结构,请看例句: It is very nice of you to help me with my English. 您帮我学英语,您真是太好了.

钟汤娇2149已知a b c d是正数,且S=a/(a+b+d) +b/(b+c+a)+c/(c+d+b)+d/(a+c+d) 求S的取值范围.
段巧骆18451605070 ______ ①S=a/(a+b+d)+b/(b+c+a)+c/(c+d+b)+d/(d+a+c)>a/(a+b+d+c)+b/(b+c+a+d)+c/(c+d+b+a)+d/(d+a+c+b)=1 ②S=a/(a+b+d)+b/(b+c+a)+c/(c+d+b)+d/(d+a+c)<(a+c)/(a+b+d+c)+(b+d)/(b+c+a+d)+(c+a)/(c+d+b+a)+(d+b)/(d+a+c+b)=2 所以1<s<2 其中用到了这样两个放缩(a/b)>a/(b+m) 和(a/b)<(a+m)/(b+m) 要求a.b.m为正数且a<b

钟汤娇2149it's+abj+of sb+to do sth
段巧骆18451605070 ______ adj是说明sb的品质特点用of sb; 说明to do sth用for sb (说人的用of sb. 说事的用for sb.) It's very nice of you to help me. 你来帮助我,你真是太好了. It's very hard for him to study two languages. 对他来说学两门外语是很难的. 用介词后面的代词作主语,用介词前边的形容词作表语,造个句子.如果道理上通顺用of,不通则用for.如: You are nice. (通顺,所以应用of). He is hard. (人是困难的,不通,因此应用for.)

钟汤娇2149a=3.5,b=5.4,c=4.3,编程三角形的面积,Area=√s*(s - a)*(s - b)*(s - c),其中s=(a+b+c)/2 -
段巧骆18451605070 ______ #include#include#define s (a+b+c)/2#define Area sqrt(s*(s-a)*(s-b)*(s-c)) void main() { float a,b,c; scanf(＂%f%f%f＂,&a,&b,&c); printf(＂%5.2f＂,Area); }

钟汤娇2149A+B+H2SO4生成Na2SO4+S+H2O中的A,B是? -
段巧骆18451605070 ______ 根据质量守恒定律,也就是在化学反应中原子种类和数目守恒的原理,可知A是Na2S,B是NaOH

钟汤娇2149下面程序段的时间复杂度是. s=0; for (i=0;i<n;i++) for (j=0;j<n;j+...
段巧骆18451605070 ______ 结果是:a+b+c 过程如下:三角形的三条边必须满足:a+b>c>a-b b+c>a>b-c a+c>b>a-c 所以:|a-b-c|+|b-c-a|+|c-a-b|=(b+c)-a+(a+c)-b+(a+b)-c=a+b+c