腰骶段损伤可引起( )
A．双上肢痉挛性瘫痪B．双下肢痉挛性瘫痪C．四肢痉挛性瘫痪D．四肢迟缓性瘫痪E．双下肢迟缓性瘫痪
参考答案：E
—Mom, I have a stomachache.
—Oh, dear. You _______. [ ]
A. should eat anything
B. shouldn't eat nothing
C. shouldn't eat anything
D. shouldn't eat something
拉线棒露出地面的长度应为（）mm。
A.300～500
B.500～700
C.700～900
D.1000
