【简答题】染色处方和条件见下表,请计算染料和助剂的用量?若配制染料母液浓度为 5g/L,则应吸取多少mL母液?加多少mL水? 工艺要求 实际用量(g) 染料( o.w.f ) 5 助剂(g/L) 20 浴比 1:100 织物重(g) 2
【判断题】中频电会使焊工产生一定的麻电现象,这在高处作业时是很危险的。
【单选题】在幻灯片中插入艺术字,需要单击插入选项卡,在功能区的()中,单击艺术字按钮。
【判断题】If the letter -p is replaced by -m in the word "clip", as indicated by "clim", the meaning of the original word has changed, therefore, the two letters are regarded as different phonemes.
【单选题】In this part of the quiz, indicate the main function of the term or phrase that is in boldface in the following passage. More than one letter might be acceptable, but you must choose only one option a...
B.
C = a conclusion marker
E.
D = a discounting term
F.
E+ = a positive evaluative term
G.
E- = a negative evaluative term
H.
H. N = none of the above
【判断题】中频电会使焊工产生一定的麻电现象,这在高处作业时是很危险的。A. 对 B. 错
【多选题】共晶焊锡组成:锡63%和铅37%,这种焊锡的特点是:
B.
在共晶温度下,焊锡由固体直接变成液体,无需经过半液体状态
D.
由于共晶焊锡由液体直接变成固体,也减少了虚焊现象