I was just about to leave ______the telephone rang.

下列句子按意义单位划分节奏正确的一项是：（    ）

阅读理解(A)
    My friend，Victor，is a zoo keeper in the National Zoo．His work is very interesting but it is hard．Sometimes it is dangerous，too．Every morning，the zoo keepers have to get up at five to prepare the food for the animals．Each kind of animal eats special food．For example，the lions must be given meat； the deer must be given grass and leaves； and the parrots must be given fruit and nuts．Sometimes some animals won't let the others eat their food．If this happens，each of them must be fed separately（分离的）．
    Every morning each cage （笼子） must be washed by the zoo keepers．This can be dangerous，especially with lions and tigers．To make the work easier，the animals are locked in the sleeping compartments（ 隔间） while the cages are being washed．When the animals are sick，the zoo keepers must look after them．Each sick animal is kept in a separate cage and given medicine．Sometimes they must be given injection．It is not easy to inject a sick lion!
    All the keepers live near the zoo．Each of them has a small house．There he lives with his family．They do not have holidays on Sundays and special holidays．Instead，each of them has a day off during the week．Each keeperhas a holiday on a different day from that of the other keepers．
    The most important job of the keepers is to look after the safety of the visitors．People must be stopped from doing dangerous things．Many people have been hurt because they did careless things，like putting their hands into the lion's cage．

把NO2气体装入带活塞的圆筒中慢慢压缩，下列叙述正确的是（   ）

阅读材料，回答问题

材料一：唐朝是个繁荣开放的朝代，与很多国家都有友好往来，特别是与日本和印度。通过频繁的交往，对两个国家产生了深远的影响。

材料二：唐朝时期实行开明的民族政策，注重与周边少数民族的友好往来，特别是对吐蕃，被尊称为“天可汗”。

材料三：“夫以铜为镜，可以正衣冠；以古为镜，可以知兴亡；以人为镜，可以明得失……”

材料四：见下图