问题
选择题
One of the young man's paintings has been _____ by some experts of the Art Field. [ ]
A. thought high of
B. thought well of
C. thought highly
D. thought good
答案
答案：B
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One of the young man's paintings has been _____ by some experts of the Art Field. [ ]
A. thought high of
B. thought well of
C. thought highly
D. thought good
答案：B
某同学要测量一节干电池的电动势和内阻，实验器材仅有一个电压表（内阻很大）、一个电阻箱、一个开关和导线若干，该同学按如图1所示的电路图进行实验，测得的数据如下表所示．
| 实验次数 | 1 | 2 | 3 | 4 | 5 |
| R（Ω） | 2.0 | 4.0 | 6.0 | 8.0 | 10.0 |
| U（V） | 1.00 | 1.19 | 1.27 | 1.31 | 1.35 |
| U/R（A） | 0.50 | 0.30 | 0.21 | 0.16 | 0.14 |
A．U-U R
B．R-U
C．R-U R
D.
-U1 R
（2）根据（1），利用测得的数据，在图2所示坐标纸上作出适当的图象．
（3）由（2）中作出的图象可知，该电池的电动势E=______V，内阻r=______Ω．
