如图标志的含义是什么（）
A．注意危险
B．禁止小型汽车通行
C．注意追尾
D．事故易发路段
参考答案：D
---I have seen so little of Mike______. Is he away on business?
---Oh, no. He just leaves for his office and returns very ______.
A．later; lately
B．later; late
C．late; lately
D．lately; late
单格蓄电池电解液比重降至（）时应重新充电。
A、1
B、1.5
C、1.17
D、1.2
