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小明参加完高考后，某日路过一家电子游戏室，注意到一台电子游戏机的规则是：你可在1，2，3，4，5，6点中选一个，押上赌注a元。掷3枚骰子，如果所押的点数出现1次、2次、3次，那么原来的赌注仍还给你，并且你还分别可以收到赌注的1倍、2倍、3倍的奖励。如果所押的点数不出现，那么赌注就被庄家没收。 （1）求掷3枚骰子，至少出现1枚为1点的概率； （2）如果小明准备尝试一次，请你计算一下他获利的期望值，并给小明一个正确的建议。
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举一反三
【单选题】在时间管理三个要素中,()最为重要,()次之,()再次之。
A.
效率  勤恳 效能
B.
效能  勤恳  努力
C.
勤恳  效能  努力
D.
效能  效率  勤恳
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【单选题】Yuan Longping looks like a farmer in these ways: (多选)
A.
he can't speak English
B.
his face and arms are sunburnt
C.
his body is slim and strong
D.
he lives in the countryside
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【单选题】诊断绒毛膜癌的辅助检查项目为
A.
血常规
B.
测定血hCG
C.
超声检查
D.
尿常规
E.
血清G-反应蛋白
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【单选题】How to keep healthy?
A.
Adults should get about two hours of aerobic exercise each week.
B.
Adults can do the exercises such as playing basketball, swimming and distance running.
C.
Lifting weights, or doing sit-ups and push-ups are permitted.
D.
All of the above are right.
查看完整题目与答案
【多选题】Yuan Longping looks like a farmer in these ways: (多选)
A.
he can't speak English
B.
his face and arms are sunburnt
C.
his body is slim and strong
D.
he lives in the countryside
查看完整题目与答案
【单选题】Eliminate these silos , and computing and communications will change in profound ways.
A.
tall towers or pits on a farm used to store grain; underground chambers in which a guided missile is kept ready for firing
B.
systems, processes, departments etc. that operate in isolation from others
查看完整题目与答案
【单选题】How to keep healthy mentally?
A.
Listen to the music and go to the pub regularly.
B.
Play with friends happily and go outing reluctantly.
C.
Listen to the music and play with friends happily.
D.
Go to the pub regularly and go outing reluctantly.
查看完整题目与答案
【单选题】How to keep healthy physically?
A.
Do not smoke and drink alcohol.
B.
Do regular exercise and have a balanced diet.
C.
Do more walking, running and swimming.
D.
Eat less fat, oil, sweets and more nutritious food.
查看完整题目与答案
【单选题】His health______, my father retired from the business last year.
A.
fails
B.
was failed
C.
failing
D.
failed
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【单选题】Which of the following is NOT among the functions of the communications dust according to the passage?
A.
To monitor light.
B.
To change color.
C.
To show movies.
D.
To play music.
查看完整题目与答案
相关题目：
【单选题】在时间管理三个要素中,()最为重要,()次之,()再次之。
A.
效率  勤恳 效能
B.
效能  勤恳  努力
C.
勤恳  效能  努力
D.
效能  效率  勤恳
查看完整题目与答案
【单选题】Yuan Longping looks like a farmer in these ways: (多选)
A.
he can't speak English
B.
his face and arms are sunburnt
C.
his body is slim and strong
D.
he lives in the countryside
查看完整题目与答案
【单选题】诊断绒毛膜癌的辅助检查项目为
A.
血常规
B.
测定血hCG
C.
超声检查
D.
尿常规
E.
血清G-反应蛋白
查看完整题目与答案
【单选题】How to keep healthy?
A.
Adults should get about two hours of aerobic exercise each week.
B.
Adults can do the exercises such as playing basketball, swimming and distance running.
C.
Lifting weights, or doing sit-ups and push-ups are permitted.
D.
All of the above are right.
查看完整题目与答案
【多选题】Yuan Longping looks like a farmer in these ways: (多选)
A.
he can't speak English
B.
his face and arms are sunburnt
C.
his body is slim and strong
D.
he lives in the countryside
查看完整题目与答案
【单选题】Eliminate these silos , and computing and communications will change in profound ways.
A.
tall towers or pits on a farm used to store grain; underground chambers in which a guided missile is kept ready for firing
B.
systems, processes, departments etc. that operate in isolation from others
查看完整题目与答案
【单选题】How to keep healthy mentally?
A.
Listen to the music and go to the pub regularly.
B.
Play with friends happily and go outing reluctantly.
C.
Listen to the music and play with friends happily.
D.
Go to the pub regularly and go outing reluctantly.
查看完整题目与答案
【单选题】How to keep healthy physically?
A.
Do not smoke and drink alcohol.
B.
Do regular exercise and have a balanced diet.
C.
Do more walking, running and swimming.
D.
Eat less fat, oil, sweets and more nutritious food.
查看完整题目与答案
【单选题】His health______, my father retired from the business last year.
A.
fails
B.
was failed
C.
failing
D.
failed
查看完整题目与答案
【单选题】Which of the following is NOT among the functions of the communications dust according to the passage?
A.
To monitor light.
B.
To change color.
C.
To show movies.
D.
To play music.
查看完整题目与答案