下列几种动物中符合“身体和附肢都分节，体表有坚韧的外骨骼”这一特征的是 A．螃蟹

京剧念白比较轻飘而唱歌则声音沉重，所以常用“四两念千斤唱”来形容。

The police were trying to _____ where the drug dealers were _____ it suddenly dawned upon them

that they might be hidden somewhere 10 miles within the border between the two countries. [ ]

A. come out; when  

B. make out; while  

C. figure out; when  

D. think out; since

急性Q波型心肌梗死时，反映心肌损伤的心电图改变是

A．T波倒置
B．R波振幅降低
C．ST段水平型压低
D．ST段弓背型抬高
E．病理性Q波或QS波

吲哚美辛是（）

A．非甾类抗炎药

B．平喘药

C．解痉药

D．脱水药

E．祛痰药

地震谣传有哪些特征？