下图是元素周期表短周期的一部分,Y、W的质子数之和为25。下列说法正确的是
A.非金属性:W>Z B.原子半径:X<Y C.Z的最高价氧化物可溶于Y的氢化物的水溶液D.Y的最高价氧化的水化物酸性强于W最高价氧化的水化物
Yuan Longping and his team have solved the problem of ________ for many people.
hunger
health
pollution
population
-Why are you laughing, Daniel?
- There is ________ funny in the newspaper. Come and see.
anything
something
everything
nothing
During Dr Mar's last visit, he ________ on 150 patients on the ORBIS plane.
operates
is operating
will operate
operated
No one is ________. The key is to learn from mistakes and never stop.
careful
generous
famous
perfect
Read the book Cute Pets, ________ you will know how to take care of your cat.
or
so
and
but