问题
选择题
—Do you like the film?
—Yes, I do. In fact, I’ve never seen a _________ one.[ ]
A. good
B. better
C. worse
D. bad
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—Do you like the film?
—Yes, I do. In fact, I’ve never seen a _________ one.[ ]
A. good
B. better
C. worse
D. bad
答案：B
晶体硼有无定形和晶体两种，参考下列数据：
| 金刚石 | 晶体硅 | 晶体硼 | |
| 熔点（K） | ＞3823 | 1683 | 2573 |
| 沸点（K） | 5100 | 2628 | 2823 |
| 硬度（Moh） | 10 | 7.0 | 9.5 |