全波整流电路具有()个整流元件.
A、1
B、2
C、3
D、4
参考答案:D
This bag isn't _____________.[ ]
A. his
B. her
C. my
D. their
应考虑的诊断为
A.脾脏被膜下出血
B.横结肠系膜血肿
C.肾盂积水并感染
D.肝脏被膜下出血
E.胰腺假性囊肿