问题
选择题
—Did you catch the early bus this morning?
—No.It had left the stop _____ I arrived there.[ ]
A. as soon as
B. as the time
C. by the time
D. during the time
答案
答案：C
搜题请搜索小程序“爱下问搜题”
—Did you catch the early bus this morning?
—No.It had left the stop _____ I arrived there.[ ]
A. as soon as
B. as the time
C. by the time
D. during the time
答案：C
在探究“决定电阻大小的因素”时，可供选择的导线如下表，实验时，每次挑选两根合适的导线，测出通过它们的电流，然后进行比较（不考虑温度的影响）．
①在探究的过程中，采用的实验方法是______法．
②为了研究电阻大小是否与导体材料有关，应选用的导线C和______．
（2）为了研究电阻大小与导体的长度有关，应选用导线C和导线______．
| 到现代号 | A | B | C | D | E | F | G |
| 长度 | 1.0 | 0.5 | 1.5 | 1.0 | 1.2 | 1.5 | 0.5 |
| 横截面积 | 3.2 | 0.8 | 1.2 | 0.8 | 1.2 | 1.2 | 1.2 |
| 材料 | 锰铜 | 钨 | 镍洛丝 | 锰铜 | 钨 | 锰铜 | 镍洛丝 |