血-脑屏障正常时,去甲肾上腺素是可进入脑的物质。
参考答案:错
While in university, we were offered a number of after school activities to________our social skills. [ ]
A. create
B. grow
C. develop
D. settle
八卦中,( )象征水。
A.离 B.坎 C.兑 D.巽