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【简答题】
如何理解饭店管理的内涵?
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举一反三
【单选题】--- When did you know the news? --- I knew nothing about it _________ my friend told me.
A.
after
B.
it
C.
because
D.
until
【单选题】My friend asked me _______. [ ]
A.
if I will come to the party
B.
that he would help me to clean the room
C.
what was wrong with me
D.
how should he do it next
【单选题】The new trade agreement should _____ more rapid economic growth.
A.
facilitate
B.
help
C.
assist
D.
speed
【单选题】下表列出部分化学键的键能: 化学键 Si - O Si - Cl H - H H - Cl Si - Si Si - C Cl - Cl 键能 /kJ•mol - 1 460 360 436 431 176 347 243 据此判断下列说法正确的是( )
A.
表中最稳定的共价键是Si﹣Si
B.
Cl 2 (g)→2Cl(g):△H=﹣243 kJ•mol -1
C.
H 2 (g)+Cl 2 (g)=2HCl(g):△H=﹣183 kJ•mol -1
D.
根据表中数据能计算出SiCl 4 (g)+2H 2 (g)=Si(s)+4HCl(1)的△H
【单选题】下表列出部分化学键的键能: 化学键 Si-O Si-Cl H-H H-Cl Si-Si Si-C Cl-Cl 键能/kJ·mol - 1 460 360 436 431 176 347 243 据此判断下列说法正确的是( )
A.
表中最稳定的共价键是Si-Si
B.
Cl 2 (g)―→2Cl(g) ΔH=-243 kJ·mol - 1
C.
H 2 (g)+Cl 2 (g)===2HCl(g) ΔH=-183 kJ·mol - 1
D.
根据表中数据能计算出SiCl 4 (g)+2H 2 (g)===Si(s)+4HCl(l)的ΔH
【多选题】下列说法正确的是
A.
虚线与虚线交接时，应是线段交接
B.
虚线与其它图线交接时，应是线段交接
C.
虚线为实线的延长线时，不得与实线相接
D.
单点长画线或双点长画线的两端，可以是点
【简答题】Chinese trade delegations have been sent to African countries, who will negotiate trade agreement.
【简答题】E “You will remember this night forever,” he told me. My friend was taking me dumpster(垃圾桶)diving for the first time. We both needed costumes for a party so he decided to show me around a few of the c...
【单选题】Please tell my friend your interesting experience exactly _______you have told it to me. [ ]
A.
as
B.
that
C.
the same as
D.
and
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