宇航员在失重状态下,体内的血液也能正常输送到离心脏较远的下肢

宇航员在失重状态下,体内的血液也能正常输送到离心脏较远的下肢,科学家是从下列哪种生物中得到的启示                                  (    )
A.萤火虫B.蝙蝠C.长颈鹿D.乌龟

答案

C解析:

相关题目

地球上最早的生命诞生于 A.温泉    B.岩层    C.原始
地球上最早的生命诞生于 A.温泉    B.岩层    C.原始大气    D.原始海洋
Writing short stories and news reports ______ her life work, she says. A. is  
Writing short stories and news reports ______ her life work, she says. A. is      B. are      C. was      D. were  
可称为天体的是(    ) A.北极星          B.地面上奔驰
可称为天体的是(    ) A.北极星          B.地面上奔驰的汽车         C.太阳系         D.按航线飞行的飞机
The artist made up his mind to devote all he could __________ his English before
The artist made up his mind to devote all he could __________ his English before going abroad. A. improve     B. to improve    C. improving     D. to improving  
  —— Was that the new comer who walked by?—— _____.A.It must
  —— Was that the new comer who walked by?—— _____.A.It must be that     B.It must have been  C.He must be     D.This must have been
图中,虚线箭头表示水平运动物体的原始运动方向,实线箭
图中,虚线箭头表示水平运动物体的原始运动方向,实线箭头表示受地转偏向力影响后实际的运动方向,图中所示四种情况,正确的是          
若(R,i为虚数单位),则ab=   ▲   .
若(R,i为虚数单位),则ab=   ▲   .
如图,在多面体中,底面是边长为的的菱形,,四边形是矩
如图,在多面体中,底面是边长为的的菱形,,四边形是矩形,平面平面,, 和分别是和的中点.   (Ⅰ)求证:平面平面; (Ⅱ)求二面角的大小。

最新题目