关于脊柱结核正确的叙述是()
A.好发于胸椎
B.腰椎结核的椎旁脓肿常为梭形
C.常有椎间隙变窄
D.椎体结核占大多数,附件很少受累
E.多数病人有结核毒性症状
参考答案:C, D
He used to ______ cards, but now he is used to _______ a walk after supper.
A.play; taking
B.playing; take
C.play; take
D.playing; taking
天线安装俯仰角在天线网络规划指定的角度内,精度为()度。
A.±1.0
B.±2.0
C.±3.0
D.±4.0