高炉冷风压力小于()MPa时,关闭混风切断阀。
参考答案:0.02
将下列特征与地名配对:
A. 太阳直射 B. 有极昼极夜现象 C. 气候四季变化明显
①兰州 ②新加坡 ③南极洲
A配 B配 C配
Father often tells me_________too much time on computer games.[ ]
A. don't spend
B. not spend
C. not to spend
D. not spending