在一定温度下的定容密闭容器中,表明反应:A(g)+2B(g)
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)
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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.
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
降低一个lgD值所需升高的温度,称为
A.D0值
B.F0值
C.D值
D.F值
E.Z值
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a∥b,则α∥β
B.若a⊂α,b⊂β,且a⊥b,则α⊥β
C.若a∥α,b⊂α,则a∥b
D.若a⊥α,b⊥α,则a∥b
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