保密责任主体是分管保密工作负责人和保密工作机构。()
参考答案:错
生物体能够由小长大,必须从外界不断的获得( )
A.水
B.只要物质
C.只要能量
D.物质和能量
The old woman has _______________ too many hardships in the past 10 years.
A.broken through
B.gone on
C.broken down
D.gone through