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【简答题】
训练鸽子绿灯亮时啄键、红灯亮时停止。对作出正确反应的鸽子给予玉米的奖励。请问因变量、因变量、控制变量分别是( )
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举一反三
【单选题】. 有如下嵌套语句 if(a
A.
k=(a
B.
k=(a
C.
k=(a
D.
k=(a
【单选题】Which sentence sounds more professional?
A.
“Do you get me?”
B.
“Do you understand?”
C.
“Does that make sense?”
D.
“Understanding?”
【单选题】Which sentence sounds more polite?
A.
“Could you give me your name please?”
B.
“Name?”
C.
“What are you called?”
D.
“What's your name?”
【单选题】Which sentence sounds more polite?
A.
“Door!”
B.
“Hold it”
C.
“Hold the door!”
D.
“Would you mind holding the door?”
【单选题】Under the influence of alcohol, people will ______.
A.
have a clear mind and be more aggressive
B.
commit self-destructive behavior
C.
suffer both natural and unnatural death
D.
be more alert and excited
【简答题】用所给词的适当形式填空. 1. The polar bears are kind of (aggress). 2. He was____ (surprise) to find no one in the zoo. 3. Zoos are like (live) textbooks for young people. 4. He ________(use) to be a teacher. 5. H...
【判断题】It is forbiddent carry any kind of weapons ,ammunitions,aggress ivetools and inflammable ,explosive ,corrosive poisonous articles on the plane 任何武器弹药，攻击性的器械一级易燃，易爆，腐蚀性的放射性的，有毒的物品都严禁带上飞机。
A.
正确
B.
错误
【单选题】Which sentence sounds more professional?
A.
“Hold on. I’m busy”
B.
“Hold the line for minute.”
C.
“Hold! I cannot talk to you now.”
D.
“May I put you on hold?”
【单选题】Which sentence sounds more polite?
A.
“There has been a slight change to your tour today.”
B.
“We changed the tour.”
C.
“We had to change the tour today.”
D.
“You will see a change in the tour today.”
相关题目：
【单选题】. 有如下嵌套语句 if(a
A.
k=(a
B.
k=(a
C.
k=(a
D.
k=(a
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