A:NH4+、Na+、SO42-、OH-
B:NH4+、H+、Cl-、CO32-
C:K+、NH4+、NO3-、Cl-
D:Cu2+、NH4+、NO3-、H+
如图所示的实验现象说明( )
将一枝带叶的杨树枝条,插入红墨水中,置于阳光下照射。请回答问题:
It is in the east of England _______ there is no doubt ________ it is going to rain tomorrow.