结晶开始出现的晶体总是向着结晶方向（）的方向长大。
参考答案：相反
The old man keeps coughing________. I’m afraid you have to send him to hospital.
A．between morning to night
B．from morning to night
C．between morning and night
D．from morning and night
起病4周后，患者反复低热，心前区闻及心包摩擦音．此时应考虑并发
A．肺部感染
B．急性心包炎
C．感染性心内膜炎
D．心肌梗死后综合征
E．肺栓塞
