【单选题】UNIX 操作系统采用的进程调度算法为 。
【单选题】N A 代表阿伏加德罗常数,下列说法正确的是( )
A.
0.5mol Al与足量盐酸反应转移电子数为1N A
B.
标准状况下,11.2L SO 3 所含的分子数为0.5N A
C.
0.5mol CH 4 所含的电子数为5N A
D.
46g NO 2 和N 2 O 4 的混合物含有的分子数为1N A
【判断题】5 mol O 3 与11.2 L O 2 所含的分子数一定相等
【单选题】UNIX 操作系统采用的进程调度算法为( )。
【单选题】In Unit 2. The boy called Information Please for information about many things except________.
C.
ways to feel comfortable
【单选题】用N A 表示阿伏加德罗常数的值,下列叙述正确的是( )
A.
0.5 mol O 3 与11.2 L O 2 所含的分子数一定相等
B.
常温常压下,78 g Na 2 O 2 和Na 2 S的混合物中含有的阴离子数为N A
C.
2SO 2 (g)+O 2 (g) 2SO 3 (g)和SO 2 (g)+ O 2 (g) SO 3 (g)的ΔH相等
D.
物质的量浓度为0.25 mol/L的MgCl 2 溶液中,含有Cl - 个数为0.5N A
【单选题】In Unit2. When the boy was young, he was amazed at an unkonwn voice in the telephone at home because_________.
A.
there was a person living in it.
B.
they had one of the first telephones.
C.
there was nothing the voice did not know
D.
people could talk over the telephone
【单选题】In Unit 2. Information Please advised the boy to ______ to stop the pain.
D.
put a piece of ice on the wounded finger
【简答题】那些年人们并没有意识到污染的严重性。(be aware)