半期考试中,六(2)40人考及格,10没考及格,他们班及格率是______.
4040+10×100%=80%;
答:他们班及格率是80%;
故答案为:80%.
阅读短文并选择正确的答案。
I'm looking for a house. I want to find two bedrooms, two bathrooms, one kitchen, one study,
one living room.
Which one?
A. 2 bedrooms, 1 kitchen, 1 living room, 1 bathroom
B. 2 bedrooms, 1 kitchen, 1 study, 2 bathrooms
C. 3 bedrooms, 1 living room, 1 kitchen, 2 bathrooms
D. 2 bedrooms, 1 kitchen, 1 living room, 2 bathrooms, 1 study
在恒温恒容条件下,能使A(g)+B(g) C(g)+D(g)正反应速率增大的措施是[ ]
A.减小C或D的浓度
B.增大D的浓度
C.减小B的浓度
D.增大A或B的浓度