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【单选题】
下列离子晶体中，晶格能最大的是A.
CaCl2
B.
CaF2
C.
NaF
D.
NaCl
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反馈参考答案：
举一反三
【单选题】由负数原码转换为负数补码的方法是除符号位外,取反加1;反过来,由负数补码转换为负数原码的方法是除了符号位外,减一取反。除此之外,还有其它方法吗?
A.
取反加1
B.
加1取反
【单选题】Listen to the audio.
A.
He doubled the reward.
B.
He cheered him on all the way.
C.
He set him an example.
D.
He had the covered on TV.
【单选题】Listen to the audio.
A.
Cleaning service in great demand all over the world.
B.
Two ladies giving up well-paid jobs to do cleaning.
C.
A new company to clean up the mess after parties.
D.
Cleaners gainfully employed at nights and weekends.
【多选题】由补码转换为原码的方法有_______________。
A.
补码减一，然后除符号位以外按位取反。
B.
补码除符号位以外按位取反，加一。
C.
补码加一，然后除符号位以外，按位取反。
D.
补码除符号位以外按位取反，减一。
【单选题】Listen to the audio.
A.
They will not be welcomed by young people.
B.
They will help to popularize early marriage.
C.
They will boost China’s economic growth.
D.
They will not come into immediate effect.
【单选题】Listen to the audio.
A.
It takes a lot of time to prepare.
B.
It leaves the house in a mess.
C.
It makes party goers exhausted.
D.
It creates noise and misconduct.
【单选题】Listen to the audio.
A.
Hire an Australian lawyer.
B.
Visit the U.S. and Canada.
C.
Settle a legal dispute.
D.
Expand their business.
【单选题】Listen to the audio.
A.
He set a record be swimming to and from an island.
B.
He celebrated ninth birthday on a small island.
C.
He visited a prison located on a faraway island.
D.
He swarm around an island near San Francisco.
【单选题】Listen to the audio.
A.
To end the one-child policy.
B.
To encourage late marriage.
C.
To increase working efficiency.
D.
To give people more time to travel.
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