42平方米=______平方分米.
42×100=4200(平方分米).
故答案为:4200.
下图是配制溶质质量分数一定的氯化钠溶液的有关操作示意图。
⑴写出图中你喜欢的一种仪器名称 ;
⑵配制氯化钠溶液的操作顺序是 (填序号);
①ABCDE ② BDCEA ③DBCAE
⑶指出并纠正图中一处错误:
In the following two hours he was _____ the performance, because it turned out to be as wonderful as he had expected.[ ]
A. tired of
B. absorbed in
C. annoyed with
D. disappointed with