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搜题
【单选题】
直流电动机弱磁调速时,转速只能从额定转速( )。A.
降低一倍
B.
开始反转
C.
往上升
D.
往下降
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】滴定分析的相对误差一般要求为0.1%滴定时耗用标准溶液的体积应控制在
A.
<10mL< /div>
B.
10~15mL
C.
20~30mL
D.
>50mL
【简答题】选字填空 拌 伴 绊 畔 搅( ) 伙( ) ( )脚 江( )
【简答题】听下面一段对话，回答1-2题。 1. What is the weight of the dictionary? A. One kilo B. Two kilos C. Three kilos 2. When does the man's flight leave? A. At 7∶15 B. At 7∶45 C. At 7∶50
【单选题】A variable represents the weight of a person. What is the level of measurement?
A.
nominal
B.
ordinal
C.
interval
D.
ratio
【单选题】There is wetting sand with weight of 2200g and the water percentage of 5%. What is the weight after its drying? ( )
A.
2100g
B.
1990g
C.
2095g
D.
1910g
【单选题】What is the weight allowance for carry-on bags mentioned in the passage?
A.
5kilos
B.
8kilos
C.
10kilos
D.
18kilos
【简答题】What is the weight, in newtons, of a body of mass 10 kg?
【单选题】A uniform meter stick balances on a fulcrum placed at the 40 cm mark when a weight W is placed at the 30 cm mark. What is the weight of the meter stick?
A.
W
B.
2W
C.
W/2
D.
0.4 W
E.
4 W
F.
5 W
【单选题】A living room has a floor dimensions of 3.5m and 4.2m and a height of 2.4m. What is the weight of the air in the room when the air pressure is 1.0atm? What is the magnitude of the atmosphere’s downwar...
A.
weight = 518 N, F = 4.0x10 3 N
B.
weight = 418 N, F = 4.0 N
C.
weight = 418 N, F = 4.0x10 3 N
相关题目：
【单选题】滴定分析的相对误差一般要求为0.1%滴定时耗用标准溶液的体积应控制在
A.
<10mL< /div>
B.
10~15mL
C.
20~30mL
D.
>50mL