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【简答题】
在 JSP 中,对象的作用域有 page 、 ____ __ ____ 、 session 和 application。
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反馈参考答案：
举一反三
【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 surfaces of the tubes ar...
A.
146000
B.
1.78E-5
C.
1.416E-5
D.
1.506E-5
E.
1.94E-5
F.
1.461E-5
【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 surfaces of the tubes ar...
A.
36509
B.
12170
C.
18255
D.
8119
【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 surfaces of the tubes ar...
A.
7
B.
21
C.
10.5
D.
4.666666666666667
【简答题】室内环境,包括 、 以及楼道、走廊等。
【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
【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 surfaces of the tubes ar...
A.
0.7
B.
0.928
C.
0.978
D.
0.994
【单选题】光阑和目镜 用显微镜观察细胞时,应选择下列哪种目镜和物镜的组合在视野内所看到的细胞数目最多( )
A.
目镜 10 ×，物镜 4 ×
B.
目镜 10 ×，物镜 10 ×
C.
目镜 10 ×，物镜 20 ×
D.
目镜 10 ×，物镜 40 ×
E.
目镜 15 ×，物镜 40 ×
【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 surfaces of the tubes ar...
A.
190
B.
53.4
C.
88.1
D.
129
E.
179.4
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