A.汽车的车头灯是用平面镜
B.牙科医生用来观察患者不易看到的部位的镜是用凹面镜
C.太阳灶用的是凸面镜
D.汽车的观后镜是用凸面镜
答案:D
The old man,_______ abroad for 20 years, is on the way back to his mother land.
A.to work
B.working
C.having worked
D.to have worked
患者,男,35岁。因近日工作紧张,休息欠佳,双目肿痛,兼口苦,烦热,便秘,脉弦滑。辨证为
A.风热型目赤肿痛B.肝胆火盛型目赤肿痛C.胃火上扰型目赤肿痛D.肝阳上亢型目赤肿痛E.以上都不是