拉伸模变形区的长度在拉制低强度金属时与拉制高强度金属时相比要（）。
A．短些
B．长些
C．相等
参考答案：B
下图是一套电化学装置,对其有关说法错误的是
A．装置A是原电池,装置B是电解池
B．反应一段时间后,装置B中溶液pH增大
C．a口若消耗1 mol CH4,d口可产生4 mol气体
D．a口通入C2H6时的电极反应为C2H6-14e-+18OH-2+12H2O
根据汉语提示完成单词。
1．I (意识到)that it doesn't matter if you trouble him. Because he is a kind man.
2. They are talking about learning the (挑战)．
3. (或许)the policeman knows where she is．
4. At last, the student understood the meaning of the story____(完全地):
5．Our teachers are very____(感动)．
2
+12H2O