下列分子中不能形成氢键的是（　　）。

A、NH3

B、N2H4

C、C2H5OH

D、H2S

简述发展适宜性课程的特点。

The latter half of the last sentence in Paragraph 3, “or one tourist for every person living in Spain”, means ______.

A、all the 37 million people living in Spain are tourists

B、every year almost as many tourists visit Spain as there are people living in that country

C、every person living in Spain has to take care of a tourist

D、every Spanish is visited by a tourist every year

（　　）

A、0.1

B、

C、0.9

D、

教案设计　对小班幼儿来说，“家”是他们最熟悉、最喜欢的话题，爱家爱父母也是“爱心教育”的始基，为此，请设计一个“我爱我家”的规范的教育活动教案。

（　　）是幼儿园中全面负责幼儿生活与教育的人员。

A、园长

B、阿姨

C、保育员

D、幼儿教师