高热情况下，犬、猫的可视粘膜呈现（）
A、潮红色
B、黄染色
C、发绀色
D、苍白色
参考答案：A
下牙槽神经阻滞麻醉的主要标志为
A．口腔前庭沟
B．下后牙咬合平面
C．颊垫尖
D．翼下颌韧带
E．腮腺导管开口
____ I got to the reading-room, I found that he ____ there.
A．At every time; read
B．Each time; was reading
C．At each time; would read
D．Every time; reads
