问题
选择题
若代数式7-2x和5-x的值互为相反数,则x的值为( )
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答案
根据相反数的意义可得:(7-2x)+(5-x)=0,
解得:x=4;
故选A.
若代数式7-2x和5-x的值互为相反数,则x的值为( )
|
根据相反数的意义可得:(7-2x)+(5-x)=0,
解得:x=4;
故选A.
从方框里所给的词的正确形式填空。每个词限用一次。
小题2:The office is open every day ______Sunday. 小题3:She said she ______send an e-mail to me the next day. 小题4:It ______that American fast food is the most popular in the world. 小题5:Bob ______ me the good news yesterday. |