问题
选择题
-I hope __________ play basketball tomorrow.
-Yes, I __________.[ ]
A. him not to, hope not too
B. he won't, hope it, too
C. he won't, hope so, too
D. him to not, hope that, too
答案
C
-I hope __________ play basketball tomorrow.
-Yes, I __________.[ ]
A. him not to, hope not too
B. he won't, hope it, too
C. he won't, hope so, too
D. him to not, hope that, too
C
在“用单摆测定重力加速度”的实验中:
(1)某同学分别选用四种材料不同、直径相同的实心球做实验,各组实验的测量数据如下。若要精确计算当地的重力加速度值,应选用第____________组实验数据。
组别 | 摆球材料 | 摆长L/m | 最大摆角 | 全振动次数 N/次 |
1 | 铜 | 0.40 | 15° | 20 |
2 | 铁 | 1.00 | 5° | 50 |
3 | 铝 | 0.40 | 15° | 10 |
4 | 木 | 1.00 | 5° | 50 |