—只6岁猫，施卵巢子宫切除术，用非吸入麻醉，其首选麻醉药是
A. 丙泊酚
B. 氯胺酮
C. 硫喷妥钠
D. 戊巴比妥钠
E. 安定
排烟口处的风速不能为0m/s，不宜大于以下哪个选项？
A. 5m/s
B. 7m/s
C. 10m/s
D. 15m/s
In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing
A. Cold front has passed
B. Low pressure center is approaching
C. Stationary front exists
D. High pressure center has passed
在Word 2007 编辑状态下，若退出阅读版式视图方式，应当按的功能键是()。
A. Ctrl
B. Esc
C. F4
Delete
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