我们养的“蚕包包”是家蚕的______，主要经过______次脱皮才会吐丝结茧．

根据句子意义选择方框内所给单词或短语的正确形式填空

小题1:Those who suffer from headache will find they get                from his medicine.

小题2:________________ customer satisfaction, the policy cannot be criticized.

小题3:They did a lot for the poor without __________________.

小题4:We can surely ____________ these difficulties as long as we are closely united.

小题5:It never _______________ to him that he would make such a great success in teaching career.

小题6:Henry will be ___________________ of the department while I am away.

小题7:I’m afraid your parents won’t ______________________ your going there.

小题8:Everyday before our class, our head teacher always                     us to see if anyone is absent from the class.

小题9:After ten years’hard work, they finally _______________ all the debts.

小题10:After several weeks, I have ________________ myself to the life of Senior Two. 

(二)

Artificial flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers. In making such models, painstaking and artistry are called for, as well as thorough knowledge of plant structure. The collection of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known throughout the scientific world. In all, there are several thousand models in colored glass, the work of two artist-naturalists, Leopold Blaschka and his son Rudolph.

The intention was to have the collection represent at least one member of each flower family native to the United States. Although it was never completed. It contains more than seven hundred species representing 164 families of flowering plants, a group of fruits showing the effect of fungus diseases, and thousands of flower parts and magnified details. Every detail of these is accurately reproduced in color and structure. The models are kept in locked cases as they are too valuable and fragile for classroom use.

The underlined word "it" refers to（）.

A．the intention

B．the collection

C．one member

D．each flower family

主客观相一致的原则，是从反对奴隶制和封建制“（）”与“（）”两种错误倾向出发而提出的。

《中外纪闻》

法定公积金达到注册资本的( )时，可不再提取。

A．5%
B．10%
C．20%
D．50%