截干与回缩修剪都可使树木更新复壮。( )
参考答案：对
Mr. White ______ in Beijing since 2000. He has lots of Chinese friends now. [ ]
A. live
B. is living
C. lived
D. has lived
生理性胎黄，黄疸出现时间一般为
A．婴儿出生后1～2天B．婴儿出生后2～3天C．婴儿出生后4～5天D．婴儿出生后1天之内或生后2～3周E．生后3～4周
