【单选题】1986年11月,中共中央、国务院转发《高技术研究发展计划纲要》,提出了生物技术、航天技术、信息技术、先进防御技术等7个领域中的15个主题项目,作为我国发展高科技的重点。该计划后被称为( )。
【多选题】编译如下 Java 源程序将得到( )。 class X1 { } class X2 { } public class Demo { class Y1{ class Y2{} } public static void main(String[] args) { } }
【单选题】macular densa is sensetive to:
【单选题】macular densa sensetive to:
【简答题】"863 计划中国生物技术领域的发展 " 观后感
【单选题】Why does macular degeneration cause blindness and other vision problems?
A.
Macular degeneration causes improper interpretation by the brain.
B.
Macular degeneration makes the retina less sensitive to the light.
C.
Macular degeneration changes the functions of rods and cones.
D.
Macular degeneration is the result of inadequate supply of blood in the retina.