来源于鸢尾科植物的药材是（）
A.款冬花
B.天麻
C.西红花
D.菊花
E.芫花
参考答案：C
We are asking anyone who saw _____ last night to contact us. [ ]
A. anything unusual
B. unusual anything
C. something unusual
D. unusual something
对怀疑有结核患者进行了口对口呼吸的急救人员，应在多少周以后检查是否感染结核（）
A.4周
B.8周
C.12周
D.16周
E.18周
