（）型疏水器是通过感知温度的变化来实现凝水的排放的。
A、钟形浮子
B、波纹管
C、脉冲
D、浮球
参考答案：B
— Have you seen Tommy, Rose?
— No, I think he ________ America.[ ]
A. has been to
B. has gone to
C. has been in
D. went to
Excel电子表格中，将一单元格中的公式计算结果数值复制到另一单元格中，应选择的菜单是
A．文件B．编辑C．格式D．工具E．插入
