题目： 下列表述中不符合合同责任相对性规则的是（）A.当事人享有的权利原则上不及于第三人B.当事人无权为第三人设定合同上的义务C.因第三人行为造成债务人违约，应由第三人向债权人承担违约责任D.第三人不能依据合同向当事人提出请求 答案： 参考答案：C
题型：补全对话，情景问答 补全对话，从方框中选择最佳选项完成对话，有两项多余。A: What's the date today, Sam?B: __1__A: Oh, tomorrow is mom's birthday. Do you remember?B: I nearly forget it. __2__ Do you have any good ideas?A: __3__B: Don't you remember we sent her one two years ago?A: Yes, Hmm. What about a wallet then?B: Great! __4__ Let's go shopping together after class.A: OK. I'll wait for you at the school gate atB: Sorry! __5__ Could you please make it half an hour later?A: All right! See you then!A. Hers is out of style.B. It's expensive.C. What shall we get her as a present?D. What about a pair of shoes?E. It's June 9th.F. I'm on duty today.G. What's her plan? 查看答案
题型：选择题 对于反应2SO2+O22SO3，下列判断正确的是A．2体积2SO2和足量O2反应，必定生成2体积SO3B．其他条件不变，增大压强，平衡必定向右移动C．平衡时，SO2消耗速度必定等于O2生成速度的两倍D．平衡时，SO2浓度必定等于O2浓度的两倍 查看答案
2SO3，下列判断正确的是