玻璃锦砖常出现的问题是（）.
A.热稳定性
B.化学稳定性
C.玻璃锦砖与纸粘结强度
D.以上都包括
参考答案：A, B, C, D
Questions 23 and 24 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.
What is the current situation
A．Drug cartels gave up the attack.
B．No evidence is provided to support the charge.
C．Nahum Acosta is released now.
D．The President canceled the travel plan.
方位角的区间由0°到360°。
