It is reported that two schools, _______are being built in my hometown, will open next year.[ ]

A. they both        

B. which both      

C. both of them      

D. both of which

急性阑尾炎常见的最典型临床表现是

A．阵发性右下腹痛

B．腰大肌试验阳性

C．发热

D．转移性腹痛

E．恶心呕吐