与产褥感染有关的炎症为
A.外阴炎
B.宫颈炎
C.输卵管炎
D.血栓性静脉炎
E.弥漫性腹膜炎
参考答案:A,B,C,D,E
Achieving a high degree of proficiency in English as a foreign language is not a mysterious _____ without scientific basis.
A.process
B.practice
C.procedure
D.program
BeCl2中Be的原子轨道杂化轨道类型为()。
A.sp
B.sp2
C.sp3
D.不等性sp3