A lot of tents, drinking water and food __________ to the homeless earthquake survivors in the past several weeks.

A．are sent

B．were sent

C．have been sent

D．had been sent

急性化脓性中耳炎早期的鼓膜改变（）

A．鼓膜紧张部周边和锤骨柄部位的血管扩张 

B．鼓膜呈珍珠颜色，活动性好，但光锥较短 

C．锤骨短突突出，光锥消失，锤骨柄向后上移位 

D．鼓膜充血肿胀，向外膨隆 

E．耳痛，检查时发现鼓膜上有搏动性闪亮点