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【单选题】依据《电力设备典型消防规程》，使用中的氧气瓶和乙炔瓶应（）固定放置。安设在露天的气瓶，应用帐棚或轻便的板棚遮护，以免受到阳光曝晒。
A.
斜靠
B.
水平
C.
垂直
D.
架空
【单选题】7. JerusalemJerusalem is located at the top of Judea mountains, 790 meters above sea level. It is one of the centers of ancient religious activities. According to their religious legends, Judaism, Chr...
A.
Muslim, Christianity and Judaism.
B.
Christianity, Muslim and Buddhism.
C.
Muslim, Christianity and Buddhism.
D.
Christianity, Judaism and Buddhism.