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【单选题】
病毒、细菌等致病因素属于 ( )A.
生物性因素
B.
物理性因素
C.
化学性因素
D.
机械性因素
E.
营养性因素
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举一反三
【单选题】The situation on the reservation is aggravated by the big generation gap in many Indians'families.
A.
pervaded
B.
frustrated
C.
worsened
D.
crumbled
【单选题】以下哪个不是用于描述现象的常用句型？
A.
Something surprising happened
B.
The first thing you should do/need to do is
C.
Currently, there is a phenomenon/increasing trend tha t
D.
… has been prevalent in our society in recent years.
【简答题】句型转换。 1. She's already done her homework. (改为否定句) She____ ____ her homework _____. 2. She has borrowed the book. She borrowed it from the library last week. (改成同义句) She ____ ____ the book for a week. ...
【单选题】Having lost all their _____ in a big fire, the Blacks had to depend on their friends and relatives for a living.
A.
galleries
B.
reputations
C.
signatures
D.
possessions
【简答题】影响社会总需求与总供给的平衡的重要因素包括（ ）。
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