夏季来临，某蜂场蜂群表现不安和虚弱，个体缩小，头尾发黑，失去飞翔能力。多数病蜂腹部膨大，下痢较重，污染隔板、巢房和箱壁。巢门前有病蜂缓缓爬行，掉在地上不久死去。不仅工蜂和雄蜂得病，蜂王也被感染对该场蜂病的诊断，首先需进行的检查是（）

A.病毒分离鉴定

B.细菌学检查

C.粪便检查

D.免疫学检查

E.临床剖检

Thomas Edison never gave up. During his lifetime, he had 1,093 _____. [ ]

A. instructions

B. competitions

C. inventions

D. injections