问题
选择题
_________ at 7:30 in the morning. [ ]
A. The classes begins
B. Class begin
C. Class begins
答案
答案：C
搜题请搜索小程序“爱下问搜题”
_________ at 7:30 in the morning. [ ]
A. The classes begins
B. Class begin
C. Class begins
答案：C
在研究水沸腾实验中，晓丽得到如下数据：
| t时/min | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| t温/℃ | 90 | 92 | 94 | 96 | 98 | 99 | 99 | ______ | 99 | 99 |
