Plastic heart valves and other human "spare parts" have __________ many recent developments in surgery.A) been possible B) become possibleC) been made possible D) made possible
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Plastic heart valves and other human "spare parts" have __________ many recent developments in surgery.
A) been possible B) become possible
C) been made possible D) made possible
选C,这里出现了recent ,所以用的完成时态.make...possible 使...成为可能,这里把宾语提去当主语了,所以用被动.
祝开心~!
D) made possible
made的宾语是many recent developments in surgery,因为过长,再者后面又带有宾语补足语possible,所以被后置,把宾补possible提前。
Plastic heart valves and other human spare parts have __________ many recent developments in surgery.A) been possible B) become possibleC) been made possible D) made possible
desecribe the function of atria,ventricles,valves,and the septum in the human heart.科学
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英语翻译1.Closure of the valves of the heart produces mechanical vibrations which are audible at the chest wall as the heart sounds.The first heart sound is caused by the closure of the atrioventricular valves and so marks the beginning of ventri
manifold valves是什么意思
the recognized causes of heart disease include the damage of the heart muscle or valves because of a congential defect or inflammation and the damage associated with various viral,bacterial,fungal,rickettsial or parasitic disesses.3835
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plastic是什么意思
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