人体的生理结构有哪八大系统？
参考答案：
消化系统、神经系统、呼吸系统、循环系统、运动系统、内分泌系统、泌尿系统、生殖系统。
— How could you ________ your friend so easily?
— She is the kind of person who ________ in a crowd. [ ]
A. pick out; stands out
B. make out; stands for
C. take out; stands by
D. bring out; stands aside
心搏骤停最简便最可靠的诊断指标是（）
A.意识丧失
B.呼吸停止
C.全身抽搐
D.心音听不到
E.大动脉搏动消失
