()的加温方式可分为发酵热加温和电热加温两种。
A.温床
B.冷床
C.温室
D.冷室
参考答案:A
输血不是主要传播途径的病毒性疾病为()
A.成人T细胞白血病
B.乙型病毒性肝炎
C.丁型病毒性肝炎
D.艾滋病
E.甲型病毒性肝炎
One advantage of G3 mobiles is that it has become a very useful tool for________daily communication.[ ]
A. taking on
B. speeding up
C. working on
D. making up