【判断题】对于平行反应,如果主反应活化能大于副反应的活化能,温度增高,有利于选择率的增大。
【简答题】a___________ n. the act of finishing sth. completely and successfully 2. a___________ v. to gain 3. a___________ v. to take as a fact 4. b___________ n. (infml) a very tall and thin person 5. c_______...
【简答题】a___________ n. the act of finishing sth. completely and successfully 2. a___________ v. to gain 3. a___________ v. to take as a fact 4. b___________ n. (infml) a very tall and thin person 5. c_______...
【单选题】When was dry ice first made?
【判断题】使用publish命令发布建筑工程图纸到DWF文件时,如果文件中不包含图层和块的信息,需要在“发布选项?”中的DWF数据选项里设置 C
【多选题】钢的退火工艺种类很多,一类是在临界温度(Ac1或Ac3)以上的退火,又称为相变重结晶退火,包括()()()和()等;
【简答题】n. the state or fact of continuing to live s__________
【单选题】将钢加热到A3以上或A1左右一定温度,保温后缓慢(一般随炉冷却)而均匀冷却的热处理方法称为退火,它可以( )。
【判断题】You do the “Chop” gesture when you are very persuasive and when you convey an important fact that you are very sure of.