蛛网膜下隙在（）与（）之间.

Look at the pride look on Ben's face. He _____ by the teacher just now. [ ]

A. seemed to be praised  

B. seems to have been praised

C. seemed to have been praised  

D. seems to be praised

同时濒临黄海和渤海的省是[ ]

A．辽宁，黑龙江      

B．山东，浙江      

C．内蒙古，黑龙江    

D．辽宁，山东

世界大洋表层盐度分布与水平衡的关系是什么？

某人酒后车祸，脊髓从胸部折断，以后他排尿的情况可能是

A．膀胱内有尿就排

B．膀胱充盈到一定程度就排

C．产生尿意就排

D．产生尿意，环境适宜就排

ET22风分器网带线速度为（）。