国家标准规定,白酒中甲醇含量(谷物原料)不得超过()g/100mL。杂醇油含量不得超过()g/100mL。
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纵坡度表征匀坡路段纵坡度的大小,它是以路线()和()之比的百分数来量度的,即i=h/l(%)。
下列内容符合北京人的是() ①直立行走②制造石器和木棒③使用天然火④模样和现代人基本相同
A. ①②③④
B. ②③④
C. ①②③
D. ①③④
提升装置的最大载重量和最大载重差,应在井口公布,严禁()和()运行.箕斗提升必须采用().
When daylight savings time is kept,the time of tide and current calculations must be adjusted.One way of doing this is to().
Add one hour to the times listed under the reference stations
B. Subtract one hour from the time differences listed for the subordinate stations
C. Apply no correction as the times in the reference stations are adjusted for daylight savings time
D. Add 15° to the standard meridian when calculating the time difference