大脑上静脉的血液主要汇入()大脑中静脉的血液主要汇入()大脑大静脉中的血液注入()
A.上矢状窦
B.海绵窦
C.直窦
D.乙状窦
E.横窦
参考答案:A,B,C
电能表上的计量单位称作______,俗称______,1kW•h=______J.
Wang Lin failed to be admitted by Hong Kong University last year, and only then _______ the importance of English.
A.he finally realized
B.he had realized
C.did he realize
D.had he realized