火花塞中心电极和旁电极之间的间隙，正常时应是（）mm。
A、1~2
B、0.6~0.8
C、0.35~0.45
D、0.2~0.3
参考答案：B
The new bridge ________ by the end of last month.
A．has been designed
B．had been designed
C．was designed
D．would be designed
建立远程视图必须首先建立与远程数据库的 【8】 。
