左思《（）》其二以比兴手法对门阀制度进行了极其强烈的批判。
参考答案：咏史
肾结核是由结核分枝杆菌引起的 __________ 、 __________ 、 __________ 病变。
When a fire _____ at the National Exhibition in London, at least ten priceless paintings were completely
destroyed. [ ]
A. broke off
B. broke out
C. broke down
D. broke up
