MR弥散加权成像（）。
A.脑动脉瘤
B.脑干肿瘤
C.颅脑外伤、头颅骨折
D.脑梗死早期诊断
E.脊髓血管畸形
参考答案：D
We left the small town, _ clearly _ no need to stay．
A．it; was
B．it; being
C．there; was
D．there; being
拆火花塞时用梅花扳手。（）
