What is the largest energy source in the U.S. today
A. Nuclear energy.
B. Coal.
C. Oil.
D. Natural gas.
查看答案
小儿感冒发热易引起惊厥的年龄是
A. 6个月以内
B. 6个月～3岁
C. 6个月～5岁
D. 6个月～7岁
E. 任何年龄
What will the home-school co-op model be like in the future
A. Funded partly by state governments.
B. Independent of public schools.
C. Linked with technology and public schools.
D. Primarily attended by poor kids aided by scholarships.
维生素B12缺乏性巨幼红细胞性贫血，肌注维生素B12的停药指征是
A. 皮肤黏膜红润
B. 网织红细胞降至正常
C. 骨髓象中幼红细胞恢复正常
D. 血清维生素B12含量恢复正常
E. 临床症状明显好转、血象恢复正常
患儿，3周前感冒后心悸气短，胸闷，乏力，食欲不振，查体：心率快，心音低钝，心律不齐，心电图：频发房室性期前收缩，血清病毒中和抗体阳性。可能的诊断是
A. 急性心肌梗死
B. 急性克山病
C. 急性心包炎
D. 病毒性心肌炎
E. 急性感染性心内膜炎
微信支付 
支付宝支付