【单选题】We ______ many friends here. [ ]
【多选题】How to write an exposition on air pollution?
A.
What is air pollution?
B.
What are bad effects of air pollution?
C.
What are the causes of air pollution?
D.
What measures can we take to improve air quality?
【单选题】Mr Brown, ________, works as manager of the company.
A.
we got here in his car
C.
in whose car we got here
D.
by whose car we got here
【多选题】下面关于设计薪酬调查问卷的说法正确的是()。
【单选题】肝硬化失代偿期并发消化道出血最常见的原因是
【单选题】一对标准直齿圆柱齿轮,若 z 1 =18 , z 2 =72 ,则这对齿轮的弯曲应力
【单选题】一对标准直齿圆柱齿轮,若z1=18,z2=72,则这对齿轮的弯曲应力()。