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【简答题】
(7分)现有下列八种物质： HCl、NH 4 Cl、N 2 、Na 2 O 2 、CaCl 2 、Cl 2 、NaF、CO 2 回答下列问题： （1）只含有离子键的物质是____（填化学式，下同）。 （2）既含有离子键，又含有共价键的物质是____。 （3）属于共价化合物的是____，其中所有原子都满足8电子结构的是____。
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举一反三
【单选题】An administrator has received an update CD with the latest technology level for AIX 5.3. The current operating system level of the server is at base AIX 5.3. What action needs to be taken to apply the...
A.
Run smit update_all
B.
Run smit install_all
C.
Boot from the installation media
D.
Run the update_all command from the mounted CD
【单选题】Choose the one which is equal to the word given blow sinister
A.
approaching
B.
foreboding
C.
concurrent
D.
arrogant
【单选题】Choose the one which is equal to the word given blow punctuate
A.
break off
B.
break down
C.
break up
D.
break out
【单选题】Choose the one which is equal to the word given blow edict
A.
decree
B.
editorial
C.
instruction
D.
essay
【简答题】(名词解释)酸解反应
【单选题】Consider Figure 5.3. After the quota is levied, the price of apples in Sweden will equal:
A.
$0.60 per pound
B.
$1.00 per pound
C.
$1.40 per pound
D.
$1.80 per pound
【单选题】Choose the one which is equal to the word given blow convict
A.
culprit
B.
invader
C.
instructor
D.
mentor
【简答题】3.(4) 阻抗变换的公式即教材中式(5.3.11)是在忽略什么因素的情况下得到的?
【单选题】Choose the one which is equal to the word given blow tart
A.
interesting
B.
positive
C.
courageous
D.
biting
【单选题】Choose the one which is equal to the word given blow meander
A.
wind
B.
glow
C.
move
D.
stop
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