______ has been ended worldwide. A: Polio B: Measles C: Rubella D: Smallpox
______ has been ended worldwide. A: Polio B: Measles C: Rubella D: Smallpox
中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected by _______.
中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected by _______.
The doctors tested on_____ to work out the polio vaccines and other effective treatment to save both the children and the families from the tremendous pains and sorrow.
The doctors tested on_____ to work out the polio vaccines and other effective treatment to save both the children and the families from the tremendous pains and sorrow.
中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______.
中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______.
Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______. A: anti-neurohomone drugs B: antiviral drugs C: vaccines D: antibiotics
Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______. A: anti-neurohomone drugs B: antiviral drugs C: vaccines D: antibiotics
一儿童口服脊髓灰质炎疫苗糖丸。你最可能找到Polio病毒的器官是 A: 骨髓 B: 脊髓灰质 C: 肠道集合淋巴结 D: 脾脏 E: 胸腺
一儿童口服脊髓灰质炎疫苗糖丸。你最可能找到Polio病毒的器官是 A: 骨髓 B: 脊髓灰质 C: 肠道集合淋巴结 D: 脾脏 E: 胸腺