甲型肝炎病程中,传染性最强的阶段是
A.潜伏期B.黄疸前期C.黄疸期D.恢复期E.慢性期
参考答案:B
The good news made us _____ very happy. [ ]
A. feel
B. to feel
C. felt
D. feeling
IEEE 802.11标准定义了______。
A.无线局域网技术规范
B.电缆调制解调器技术规范
C.光纤局域网技术规范
D.宽带网络技术规范