— It's necessary and important for them students at school to join the Clean Plate Campaign. It’s good for them to form good habits.
— Sure. We should try to _______ all the food that we’ve ordered.
A:give up
B:eat up
C:turn up
D:show up
读我国地壳运动观测网图,回答:
对地壳运动进行精确观测采取的主要技术是( )
1984年春,潍坊举办了第一届国际风筝会。风筝成为潍坊文化的象征物、城市名片。这得益于( )
(几何证明选讲选做题)如图,PT是圆O的切线,PAB是圆O的割线,若PT=2,PA=1,∠P=60o,则圆O的半径r=____
下列选项中不属于青春期发育特征是