在一定温度下的定容密闭容器中,表明反应:A(g)+2B(g)C(g)+D(g)已

题型:选择题

问题:

在一定温度下的定容密闭容器中,表明反应:A(g)+2B(g) C(g)+D(g)已达到平衡状态的是[ ]

A. A、C、D的物质的量浓度相等              

B. 混合气体的密度不再改变  

C. 气体的总物质的量不再改变               

D. v(B) = 2v(C)

考点:达到化学平衡的标志
题型:选择题

根据图画,用所给单词的适当形式完成短文:

( other, first, hit, back, doing, side, what, saved, once, across)

     One day, a blind (盲人) is going (1) ______ the street. A truck(卡车)was going to (2) ______him.

Jack was running up to him and pulling him (3) ______. The man was (4) ______. Jack was taking him

to the other (5) ______ of the street. The man thanked him for (6) ______ that. But Jack didn't wait for

his thanks. Jack went to school at (7) ______. It was late. The (8) ______ class had been on. Jack told

the teacher (9) ______ had happened. The teacher asked the (10) ______children to learn from him.

题型:选择题

类脂质渐进性坏死的治疗方案不包括()。

A.避免外伤,低脂饮食

B.皮损处照射X线或紫外线

C.口服大量维生素E

D.口服大量维生素C

E.口服胰岛素

题型:选择题

降低一个lgD值所需升高的温度,称为

A.D0

B.F0

C.D值

D.F值

E.Z值

题型:选择题

设a,b为两条直线,α,β为两个平面,则下列结论成立的是(  )

A.若a⊂α,b⊂β,且ab,则αβ

B.若a⊂α,b⊂β,且a⊥b,则α⊥β

C.若aα,b⊂α,则ab

D.若a⊥α,b⊥α,则ab

题型:选择题

品类宽度具有一定的(),经确定后,非经规定程序,不可随意更改。

A、严肃性

B、规范性

C、严格性

D、统一性

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