患者，男性，20岁。因患大叶性肺炎需青霉素治疗。皮试5分钟后出现胸闷.气急.皮肤瘙痒.面色苍白.脉搏细弱.血压下降.烦躁不安，考虑患者可能发生了
A. 青霉素毒性反应
B. 血清病型反应
C. 呼吸道过敏反应
D. 过敏性休克
E. 皮肤组织过敏反应
查看答案
which of the following sentences has the punctuation error?
A. The alarm clock sounded, the students got up quickly.
B. The alarm clock sounded; the students got up quickly.
C. The alarm clock sounded. The students got up quickly.
D. When the alarm clock sounded, the students got up quickly.
An intruductory paragraph should arouse readers' interest and ________ the main idea of the essay.
A. ignore
B. introduce
C. develop
D. emphasize
Which one is not used as a transition word to give examples?
A. for instance
B. such as
C. likewise
D. namely
_________ is the core sentence of a paragraph.
A. Topic sentence
B. The first sentence
C. Supporting sentence
D. Concluding sentence
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