硝酸纤维类胶片等物质缓慢分解,温度上升时,要立即()。
A.用水降温
B.用泡沫覆盖
C.用二氧化碳冷却
D.搬出库房外,散热摊凉
参考答案:D
Each box is an activity; the number it contains is the duration of the activity in days.The duration of the critical path is ().
A.16days
B.14days
C.19days
D.20days
小儿金黄色葡萄球菌肺炎最具特点的是()
A.弛张热
B.白细胞总数高,有核左移
C.肺部有多发小脓肿
D.可出现猩红热样皮疹
E.起病急,病情严重