A:①②
B:②③
C:③④
D:①④
祖国的山河一年四季美景如画,图中的描述属于凝华的是( )
﹣ It is reported that cancer can be controlled at a temperature lower than 100℃below zero.
﹣ Really? ______ nice surprise!
已知z=1-2i32+i(i为虚数单位),则|z|=( )
物质的下列性质中,属于化学性质的是( )