皮皮学，免费搜题
登录
搜题
【单选题】
动机具有活动性的特征，指的是(    )
A.
动机与行为之间不是简单地一一对应的关系
B.
动机能够对行为起到发动、加强、维持的推动作用
C.
动机随着需要的发展而不断地更替
D.
动机之间往往存在着相互竞争
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】普通机床床身的毛坯多采用( )
A.
冲压件
B.
锻件
C.
焊接件
D.
铸件
查看完整题目与答案
【单选题】普通机床床身的毛坯多采用( )
A.
冲压件
B.
焊接件
C.
铸件
D.
锻件
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
7
B.
21
C.
10.5
D.
4.666666666666667
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
10
B.
20
C.
40
D.
65
E.
15
F.
37.5
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
178.7
B.
53.2
C.
87.8
D.
128.5
E.
190
查看完整题目与答案
【判断题】导游员处理游客个别要求的程序是:立即向领导汇报、等待旅行社通知、按旅行社要求满足游客的要求。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
2.51
B.
0.0251
C.
2.59
D.
0.0259
E.
0.0255
F.
0.0293
查看完整题目与答案
【单选题】某单动往复栗 泵么活塞 直径为 4cm , 往复次数 为60次/min,冲程为1 5 cm , 该往复泵的理论流量为 ( ) L/min。
A.
11.3
B.
22.6
C.
678.2
D.
5.7
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
0.7
B.
0.928
C.
0.978
D.
0.994
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
190
B.
53.4
C.
88.1
D.
129
E.
179.4
查看完整题目与答案
相关题目：
【单选题】普通机床床身的毛坯多采用( )
A.
冲压件
B.
锻件
C.
焊接件
D.
铸件
查看完整题目与答案
【单选题】普通机床床身的毛坯多采用( )
A.
冲压件
B.
焊接件
C.
铸件
D.
锻件
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
7
B.
21
C.
10.5
D.
4.666666666666667
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
10
B.
20
C.
40
D.
65
E.
15
F.
37.5
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
178.7
B.
53.2
C.
87.8
D.
128.5
E.
190
查看完整题目与答案
【判断题】导游员处理游客个别要求的程序是:立即向领导汇报、等待旅行社通知、按旅行社要求满足游客的要求。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
2.51
B.
0.0251
C.
2.59
D.
0.0259
E.
0.0255
F.
0.0293
查看完整题目与答案
【单选题】某单动往复栗 泵么活塞 直径为 4cm , 往复次数 为60次/min,冲程为1 5 cm , 该往复泵的理论流量为 ( ) L/min。
A.
11.3
B.
22.6
C.
678.2
D.
5.7
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
0.7
B.
0.928
C.
0.978
D.
0.994
查看完整题目与答案
【单选题】Air at 1 atm and 10 °C flows across a bank of tubes 15 rows high and 5 rows deep at a velocity of 7m/s measured at a point in the flow before the air enters the tube bank. The suces of the tubes ar...
A.
190
B.
53.4
C.
88.1
D.
129
E.
179.4
查看完整题目与答案