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【单选题】
最早人工接种“牛痘”预防天花试验获得成功的是:A.
公元16世纪的中国人民
B.
Jenner
C.
Jerne
D.
Pasteur
E.
Burnet
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皮皮学刷刷变学霸
举一反三
【简答题】电源电动势的方向由电源的 极经电源内部到 极的方向。
【单选题】Which of the following statements of Premier Zhou Enlai is NOT correct?
A.
He was a skilled and able diplomat.
B.
He helped formulate policies regarding the bitter disputes with the U.S., t;he Soviet Union, India and Vietnam.
C.
He helped orchestrate Richard Nixon's 1970 visit to China.
D.
He advocated peaceful coexistence with the West after the stalemated Korean War.
【简答题】柴油在圆形直管内作强制滞流流动,给热系数可用下式计算: 。若流量和物性不变,将管内径减半后仍为滞流,则管内对流传热系数变为原来的__________倍。
【单选题】In _______ Premier Zhou Enlai passed away in _________.
A.
the sies, the sies
B.
his sies, his sies
C.
his sies, the sies
D.
the sies, his sies
【单选题】Recently a film was made _________ Premier Zhou Enlai.
A.
in charge of
B.
in memory of
C.
in search of
D.
in case of
【单选题】On the day of his funeral, the whole nation _____ the death of our beloved Premier Zhou Enlai.
A.
pained
B.
mourned
C.
saddened
D.
regretted
【多选题】引起巨幼细胞性贫血的病因主要有
A.
喂养不当的婴幼儿
B.
服用影响叶酸代谢的药物,如甲氨蝶呤等
C.
长期酗酒者
D.
孕妇、乳母
E.
叶酸需求量剧增者,如甲亢、白血病等
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