何首乌来自（）科。
参考答案：蓼
As they ______ their way through the desert the sun beat down upon them with more fierceness.
A．went
B．took
C．came
D．made
急性根尖周炎脓肿切开的主要临床依据是（）
A.根尖肿大、压痛
B.剧烈疼痛
C.扪诊有波动感
D.体温38℃以上
E.患牙叩痛明显
