Nowadays meteorologists (气象学家) can make good forecast for 3 or 5 days. Perhaps soon they may

be able to do that for a week or _____. [ ]

A. more ahead

B. more behind

C. less ahead

D. less behind

尺桡骨骨折继发前臂缺血性肌挛缩可造成的畸形是

A．爪形手
B．刺刀畸形
C．猿手畸形
D．垂腕畸形
E．餐叉畸形