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【单选题】
防止蓄电池室内爆炸的措施有()。A.
采用免维护蓄电池;
B.
密封式蓄电池的加液的通气孔,经常保持畅通,便于气体逸出;
C.
蓄电池内部连接和电极连接要牢固,防止松动打火;
D.
室内保持良好的通风;
E.
蓄电池室内严禁烟火,室内应装设防爆照明灯具,且控制开关应装在室外。
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举一反三
【单选题】● Which statement about the preliminary design stage of a software development project is true? （75） . （75）
A.
The preliminary design is an internal document used only by programmers
B.
The preliminary design is the result of mapping product requirements info software and hardware functions
C.
The preliminary design of the product comes from the requirement specification
D.
The developers produce the preliminary design by defining the software structure in enough detail to permit coding
【单选题】1999年5月7日美国使用了五枚制导炸弹袭击了中华人民共和国驻南斯拉夫联盟共和国大使馆，其中打击到大使馆地下室的精确制导炸弹却变成了()，没有爆炸。
A.
炸弹
B.
哑弹
C.
中立弹
D.
自卫弹
【简答题】The smart buildings discussed in the passage ________. A) would cause serious financial problems B) would be worthwhile though costly C) would increase the complexity of architectural design D) can re...
【简答题】A)primitive B)prior C)previous D)preliminary
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