CT检查颈部椎管,一般认为椎管狭窄的前后径应小于()。
A.10mm
B.12mm
C.14mm
D.16mm
E.18mm
参考答案:B
With no central government,the island was ruled by kings, a different region of the country.
A.each controlling
B.each controlled
C.each to control
D.each was controlling
在互联网上,居民小李将自己家里闲置的生活用品发布到网上,注明自己所需物品,然后等待网友来交换,以物换物,使闲置的资源得到更充分的利用。这种以物换物活动()。
A.增加了商品的价值
B.很好地促进了商品流通
C.人为地抑制了消费
D.符合绿色消费的理念