题目

Anyone ________ has a dog as a pet will tell you ________ a dog means to a family. A . who; what B . who; why C . which; what D . which; why 答案：A计算题：（1）12﹣18+7﹣15；（2）×（﹣7）﹣（﹣13）×（﹣）；（3）；（4）（-3）×（-）÷（-1）；（5）-19×8；（6）﹣12﹣×[（﹣2）3+（﹣3）2]．