题目

下列表达方式错误的是(     A． CO2分子的结构式：O＝C＝O     B. S2－的结构示意图： C．O—18的原子符号：          D. 氯化氢分子的电子式： H+ [:  :]-  答案：DThere were a lot of people in the park. We had ______ to take a rest, so we got very tired. A．everywhere                           B．somewhere C．nowhere                              D．anywhere