下列生物现象中与温度因素密切相关的是[ ]
A．鸟类的迁徙与繁殖
B．仙人掌的叶片变态成刺状
C．黄鱼季节性的洄游
D．柑橘在北方不易存活
CD
Before joining the Department of Defense, Mr． Panetta _______ as director of the CIA from February 2009 to June 2011．
A．would serve
B．served
C．was served
D．had been served
子宫黏膜下肌瘤临床表现不恰当的是（）
A.经量过多、经期延长
B.坏死感染可出现 * * 不规则流血
C.容易发生早期流产
D.可致不孕
E.肌瘤小时无临床症状
