单侧上肢血压降低、脉搏减弱,提示狭窄的动脉是().
A.同侧颈动脉
B.同侧锁骨下动脉
C.同侧颅外椎动脉
D.同侧颅外动脉
E.同侧锁骨上动脉
参考答案:B
The art club is for members only. You can’t go in _________ you are a member.
A.unless
B.because
C.if
D.though
由多种精致的植物花粉和乳糖制得的营养保健花粉制品