能够增加血流阻力,从而调节血流量和血压的血管是()
A.大动脉
B.中动脉
C.小动脉
D.大静脉
E.中静脉
参考答案:C
下列属于物流分系统技术标准中的运输车船标准的有()。
A.噪音等级标准
B.废气排放标准
C.载重能力标准
D.船舱尺寸标准
E.运输环境标准
— Why didn't Alex attend the party yesterday evening?
— He _____ not have wanted to see me. [ ]
A. should
B. might
C. could
D. would