题目

计算. (1) ; (2) -3- ; (3) ×(-2)-2 ÷ ; (4) ÷(-7)2. 答案:解:原式= −58×314×165×76=−12 解:原式=-3- [−5+(1−15×35)×(−12)] =-3+ 5+(1−325)×12 =2 1125 解:原式= 56 ×(-2)+ 163 =3 23 解:原式=(50-28+33-6)× 149 =49× 149 =1.I could see he was carrying a gun. Which of the following is correct for the underlined word in the sentence?A. /gu:n/ B. /gn/ C. /gn/ D. /gn/
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