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【简答题】
装饰器本质上是一个
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【简答题】阿尔伯特. 爱因斯坦
【单选题】One of the functions of ventilation is to _____ the humidity of spaces containing sources of moisture, or to _____ the temperature of spaces not mechanically cooled such as the engine room.
A.
increase/reduce
B.
reduce/increase
C.
increase/increase
D.
reduce/reduce
【单选题】下列说法正确的是 [ ] ①质子数相同的微粒一定属于同种元素 ②同位素的化学性质几乎完全相同 ③原子种类由质子数和中子 数共同决定 ④电子数相同的微粒一定属于同种元素 ⑤每种元素都有两种或两种以上的核素 ⑥元素的化学性质主要由原子最外层电子数决定
A.
①②④
B.
①③④⑤
C.
②③⑥
D.
①②③④⑤⑥
【单选题】Which of the following functions is not one of the functions of air conditioner?
A.
Refreshing the air
B.
Waking up
C.
Adjusting the air humidity
D.
Adjusting the air temperature
【简答题】正铲挖土机的挖土特点是()。 (A)直上直下，自重切土 (B)后退向下，强制切土 (C)后退向下，自重切土 (D)前进向上，强制切土
【单选题】Which of the following functions is not one of the functions of air conditioner?
A.
Refreshing the air
B.
Making person upset
C.
Adjusting the air humidity
D.
Adjusting the air temperature
【单选题】Which of the following functions is NOT one of the functions of air conditioner?
A.
Refreshing the air
B.
Waking up
C.
Adjusting the air humidity
D.
Adjusting the air temperature
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