下列FORTRAN表达式中，值为．TRUE.的是( )。

A:NOT.(.TRUE.OR.TRUE.AND．.FALSE.) B:NOT..FALSE..AND．.FALSE. C:NOT.(.TRUE..AND．.FALSE.) D:NOT.FALSE.AND．TRUE.EQV.FALSE.

下列FORTRAN表达式中，值为.TRUE.的是( )。

A:.NOT.(.TRUE..OR..TRUE..AND..FALSE.) B:.NOT..FALSE..AND..FALSE. C:.NOT.(.TRUE..AND..FALSE.) D:.NOT..FALSE..AND..TRUE..EQV..FALSE.

Which of the following is TRUE

A:We use all the words, phrases and quotations from Shakespeare’s writings. B:Shakespeare’s writings have become the property of those who are learning to speak English. C:It is likely to be true that people often do not know the origin of the words they use. D:All the words people use are taken from Shakespeare’s writings.

下面程序段：
boolean a=false；
boolean b=true；
boolean c=(a&&b)&&(!b)；
boolean result=(a&b)&(!b)；
执行完后，正确的结果是( )。

A:c=false；result=false B:c=true,result=true C:c=true；result=false D:c=false；result=true

下面程序段的输出结果为 public class Test { public static void main(String args[]) { boolean a,b,c; a=(3＜5); b=(a==true); System.out.printin( "a="+a+"b="+b) ; c-(b==false); System.out.println(b="+b+"e="+c) ; } }

A:a=true b=false b=true c=false B:a=true b=false b=true c=true C:a=true b=true b=true c=false D:a=false b=false b=true c=false

若$\vec{a},\vec{b}$为非零向量,且$|\vec{a}+\vec{b}|=\left|\vec{a}\right|+\left|\vec{b}\right|$,则( )

A:$\vec{a}$与$\vec{b}$方向相同 B:$\vec{a}=\vec{b}$ C:$\vec{a}=-\vec{b}$ D:$\vec{a}$与$\vec{b}$方向相反

下列条件中能得到$\overrightarrow{a}=\overrightarrow{b}$的是( )

A:$\left|\overrightarrow{a}\right|=\left|\overrightarrow{b}\right|$ B:$\overrightarrow{a}$与$\overrightarrow{b}$的方向相同 C:$\overrightarrow{a}=\overrightarrow{0}$，$\overrightarrow{b}$为任意向量 D:$\overrightarrow{a}=\overrightarrow{0}$且$\overrightarrow{b}=\overrightarrow{0}$

若非零向量$\overrightarrow{a}$，$\overrightarrow{b}$满足$|\overrightarrow{a}-\overrightarrow{b}|=\left|\overrightarrow{b}\right|$，则（ ）

A:$\left|2\overrightarrow{b}\right|>|\overrightarrow{a}-2\overrightarrow{b}|$ B:$\left|2\overrightarrow{b}\right|<|\overrightarrow{a}-2\overrightarrow{b}|$ C:$\left|2\overrightarrow{a}\right|>|\overrightarrow{a}-2\overrightarrow{b}|$ D:$\left|2\overrightarrow{a}\right|<|\overrightarrow{a}-2\overrightarrow{b}|$

设非零向量$\overrightarrow{a}$,$\overrightarrow{b}$满足$|\overrightarrow{a}+\overrightarrow{b}|=|\overrightarrow{a}-\overrightarrow{b}|$，则( )

A:$\overrightarrow{a}\perp \overrightarrow{b}$ B:$\left|\overrightarrow{a}\right|=\left|\overrightarrow{b}\right|$ C:$\overrightarrow{a}//\overrightarrow{b}$ D:$\left|\overrightarrow{a}\right|>\left|\overrightarrow{b}\right|$

true shunt