A:大化改新
B:采邑改革
C:丕平献土
D:亚历山大东征
This is Jim. He is thirteen. He is from the USA. He is a student. He has a good friend. His name is Jack. Jack is fifteen. He is from Canada. Jack is tall but Jim is short. They are in the same class, but they are in different grades. Jim is in Class Two. Jack is in Class Two, too. They go to school(上学) at seven in the morning and go home(回家) at six in the afternoon.
观察下列算式:
①1×3﹣22=﹣1
②2×4﹣32=﹣1
③3×5﹣42=﹣1
伊伐布雷定(C27H36N2O5)是世界上治疗心脏病的最新药物之一.下列有关伊伐布雷定的说法错误的是(相对原子质量:H﹣1 C﹣12 N﹣14 O﹣16)( )