皮皮学，免费搜题
登录
搜题
【简答题】
同时作用在物体上有两个或两个以上的力偶,这些力偶叫做力偶系。在同一个平面内的力偶系叫做 。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】There are scientific proofs that the alcohol-addicts are ______ to heart attack.
A.
infectious
B.
eligible
C.
accessible
D.
prone
【简答题】David: Good morning.l'd like to make an appointment to see Mr Bond this morning , please. Nursc: l' m sorry.I don' t have any appointments this morning. David: Oh , dear.I'm feeling really ill. Nurse:...
【简答题】No sooner had they got the goods covered up＿＿＿it started raining hard．
【简答题】They had no sooner entered the theatre than the performance began. (no sooner)
【简答题】American researchers say drinking tea may help strengthen the body’s defense system against infection（感染）．Doctors at Brigham and Women’s Hospital in Boston，Massachusetts，did the study．The team studied...
【单选题】Keeping taking drugs that prevent infection throughout the cold season will
A.
cure infection completely.
B.
become inexpensive in the long run.
C.
increase the risk of addiction to drugs.
D.
have more side effects than other choices.
【单选题】Eosinophile granulocyte is related to
A.
Allergic reaction
B.
releasing histamine
C.
Defence against bacterial infectio
D.
Produce immunoglobulin
E.
parasite infection
【简答题】American researchers say drinking tea may help strengthen the body’s defense system against infection. Doctors at Brigham and Women’s Hospital in Boston, Massachusetts, did the study. The team studied...
相关题目：