问题
单项选择题 A1/A2型题
传染病的基本特征是（）
A.传染性、流行病学特征、感染后免疫、病原体
B.传染源、传播途径、人群易感性、感染后免疫
C.传染源、传染性、流行病学特征、感染后免疫
D.传染性、流行病学特征、传播途径、人群易感性
E.病原体、传染源、流行病学特征、感染后免疫
答案
参考答案：A
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传染病的基本特征是（）
A.传染性、流行病学特征、感染后免疫、病原体
B.传染源、传播途径、人群易感性、感染后免疫
C.传染源、传染性、流行病学特征、感染后免疫
D.传染性、流行病学特征、传播途径、人群易感性
E.病原体、传染源、流行病学特征、感染后免疫
参考答案：A
| 选择适当的词组填空。根据所提供的语景，从方框中选择正确的短语填空完成句子： | |
2. The pilot, whether _____or design, made the plane do a sharp turn. 3. The library was built ______ the scientist. 4. As they don't have enough gas, they have decided to ______gas supplies to other cities. 5. The good news _________ whoever heard it. 6. -I wonder if I could use your dictionary. -Sure, _____. 7. He _________ making everybody around him happy. 8. On Halloween, children would _____ and go door to door asking for treats or playing tricks. |