The color of the signal flare sent up by a submarine about to surface due to an emergency condition within the submarine is().
A. green
B. red
C. white
D. yellow
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由下向上掘进20°以上的倾斜巷道时,必须将溜煤(矸)道与人行道分开,防止煤(矸)滑落伤人。
A. 正确
B. 错误
下列选项中,()是指在正常的施工技术和组织条件下,完成单位合格产品所必需的人工消耗量标准。
A. 劳动定额
B. 概算定额
C. 施工定额
D. 企业定额
()are represented by phonetic symbols because there is no one-to-one correspondence between written letters and spoken sounds.
按照《中华人民共和国药典》规定的中药老幼剂量折算表,6~9岁的服用剂量相当于成人剂量的()
A. 1/7~1/5
B. 1/4~1/3
C. 1/5~1/4
D. 2/3~1
E. 2/5~1/2