14 species are edible plants , 37 species are medicinal plants , 11 species are ornamental plants and31 species are feeding plants , the major types of halophytic vegetation in hebei province include ptenothalophyta such as tamarix chinensis brush and siberian brush , and littoral halophytic vegetation such as succulent vegetation , poion , chomophyte and etc . epidermal cell exosporium of tamarix chinensis blade is papillous and capillaceous ; stoma and salt - secreting gland are under the epidermis ; differentiation level of mesophyll tissue is rather high ; porder camber is obvious ; and mechanical tissue is developed 河北省盐生植物的经济价值较高，其中可食用的盐生植物共计14种，可药用的盐生植物37种，可饲用的盐生植物31种，具有观赏价值的盐生植物11种，可以作为纤维植物计约9种。河北省主要盐生植被类型有柽柳灌丛、西伯利亚白刺灌丛等落叶灌丛和肉质型、禾草型、杂类草型盐尘植被等滨海盐生植被。
To study the effects of various chocolate types on brain power , bryan raudenbush and colleagues had volunteers in four groups separately consume 85 grams of milk chocolate ; 85 grams of dark chocolate ; 85 grams of carob ; and nothing the control condition . after a 15 - minute digestive period , participants completed a variety of computer - based neuropsychological tests designed to assess cognitive performance including memory , attention span , reaction time , and problem solving ability 为了研究不同种类巧克力对于人脑力的影响，布莱恩兰登布什及其他研究人员将参与实验的志愿者分为四组，其中三组分别摄入85克牛奶巧克力85克黑巧克力和85克角豆粉一种可食用的粉状物质，用角豆树的种子和角豆荚磨制而成，常用作巧克力的替代品还有一组不吃任何东西。
Guided by instinct , by the otherworldly radiance of the southern cross , they head unerringly for their traditional breeding ground where - after a ritual courtship of intricate dances and delicate maneuvering , accompanied by a cacophony of ecstatic song - they will pair off into monogamous couples and mate 在冰雪中没有任何的食物可食用的情况下，体重只剩下原来三分之一的企鹅妈妈生下了独一无二的企鹅蛋。然而它们可不能沈溺在新生的喜悦中，更艰难的挑战紧随而至。
