如遇到()情况,不需要立即关闭设备电源开关,并拔掉电源线。
A、拆卸电脑的时候
B、有液体进入电脑主机或显示器等设备中
C、电脑坠落、受到撞击或发生震动
D、电脑死机
参考答案:D
影响DNA合成的常见因素()
A.丙酮酸激酶缺乏
B.铁缺乏
C.维生素C缺乏
D.微量元素缺乏
E.叶酸和维生素B12(VitB12)缺乏
So well _____ in 2009 that the world has agreed that it was the year of China. [ ]
A. did China perform
B. China has performed
C. was China performed
D. China is performing