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【单选题】
为了将沸点提高到105℃，煮沸消毒时可加入A.
碳酸氢钾
B.
碳酸氢钠
C.
碳酸钙
D.
亚硝酸钠
E.
乳酸钠
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皮皮学刷刷变学霸
举一反三
【单选题】What was the possible cause of the outbreak of coronovirus?
A.
A kind of animal
B.
A kind of insect
【单选题】A ________of technology is working hardly to research the useful vaccine against the coronovirus.
A.
panel
B.
pancake
C.
pancreatic
D.
penniliess
【单选题】During coronovirus epidemic, ______ cases are required to do quarantine at home for at least 14 days.
A.
suspected
B.
confirmed
C.
critical
【简答题】现在你准备网上购物,你可以选择哪些支付方式?请列出( 6 种以上):
【简答题】Read the three words "Novel Coronovirus Pneumonia".
【单选题】The new research reveals that the novel coronovirus can spread during ______ period.
A.
isolation
B.
incubation
C.
quarantine
【单选题】Which is not the main symptom of novel coronovirus-caused pneumonia?
A.
cough
B.
fever
C.
running nose
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