【单选题】Which of the following is Not true about Northern Ireland?
A.
Northern Ireland is the smallest part of UK.
B.
Apart from political troubles, the crime rate in Northern Ireland is very low.
C.
Because of the poor performance of the economy, the living costs in Northern Ireland is extremely high.
D.
Northern Ireland is now a quieter and more civilized place than it has been for the last thirty years.
【简答题】除病毒外,生物体都是由 ___ 构成的。
【简答题】除生殖细胞外,生物体的体细胞中,染色体是______存在的,基因也是_____存在的。它们一半来自_______,一半来自______,因此,后代个体具有___________的遗传物质。
【单选题】以下有关命题的说法正确的是( )
A.
命题“若 则 或 ”的逆否命题为“若 或 ,则 ”
C.
“ ”是“方程 表示双曲线的充分不必要条件”
【单选题】When we we draw air into our lungs. [ ]
【单选题】Which of following statement is not true about Northern Ireland?
A.
There are 6 counties in Northern Ireland.
B.
The Good Friday Agreement was approved in 1998.
C.
Northern Ireland is known for its peaceful life.
D.
"Bloody Sunday" is an important symbol of Britain oppression.
【单选题】下列关于各装置图的叙述不正确的是 [ ]
C.
关闭活塞a,从b处加水,可以检查装置③的气密性
【简答题】One can have many experiences, but the one I never forget is my bicycling trip in Taiwan. When we were going to 46 school, my teacher suggested that we could do something special to remember our schoo...
【简答题】以下命题正确的有________________. ①到两个定点 距离的和等于定长的点的轨迹是椭圆; ②“若 ,则 或 ”的逆否命题是“若 且 ,则 ab ≠0”; ③若两个平面垂直,则一个平面内的已知直线必垂直于另一个平面的任意一条直线; ④两圆 在交点处的切线互相垂直,那么实数 的值为 .