下列疾病中,都属于传染病的是( )
A:恶性肿瘤、坏血病
B:糖尿病、色盲
C:麻疹、疟疾
D:白化病、癌病
____ to online communications, some students ____ ____ ____ ____ be buried in a virtual world.
—It's ________.
运载火箭.