自2010年10月以来，我国北方多个省份遭遇干旱，如图为干涸开裂的河床。在干旱地

16里面有（   ）个十和（   ）个一；19是由（   ）个一和（   ）个十合起来的数。

根据短文内容，用方框中所给单词的适当形式填空，每词限用一次。

The panda is one of the most popular 　小题1:　 in the world. A panda can grow up to 1.5 meters long and weigh up to 160kg. People think the panda is very　小题2:　. So it is not surprising that the WWF（世界自然基金会）chose the panda as its symbol. The WWF tells people about animals that are in 　小题3:　and raises money to save them. The panda only 　小题4:　 in the wild in China. In the early 1980s, there were only 1,000 left in the wild. The main reason 　小题5:　 pandas are endangered(濒临灭绝的) is that the area where pandas can live has become smaller.

在△ABC中,已知两条边a=3,b=4,则第三边c的取值范围是      _________.

大豆、菜豆等植物的叶为三出复叶。

轴与轴承组装时，应先清洗轴承与端盖，并测量轴承与轴的配合、轴承的（）间隙。

A.轴向；

B.径向；

C.轴向和径向；

D.端向。