中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected by _______.
vaccines
举一反三
- 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
- ______ has been ended worldwide. A: Polio B: Measles C: Rubella D: Smallpox
- Today, most of people won’t study either Greek or Latin because （） A: they are no longer important B: people do not have enough time C: they are no longer existed D: people can not learn them well
- 中国大学MOOC: You, like most people, probably have been such a situation.
内容
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The first infectious disease that has been eradicated is ( ). A: Measles B: Poliomyelitis C: Smallpox D: Chickenpox
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中国大学MOOC: For the local people, the consequences of the disaster have been _______.
- 2
中国大学MOOC: ---- Why is Lucy so happy today?--- Because she will have ____ holiday soon.
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中国大学MOOC: People in this small village have never been __________ to Western life.
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中国大学MOOC: ___________is the most common cause of vision loss in people over age 40 and is the principal cause of blindness.