叶子
叶子(Leaf) :让你平昔周旋做五子棋义工的原由? 刘国斌:我爱好五子棋,也有和志同道合者之间的一份情感,任何一种容器都是装的满的,惟有...
聆风
』 其中日产聆风(Leaf)作为进口车产品,东风日产已经确定其将会以东风启辰品牌进入中国新能源车市。
[植] 叶
...模式看成是树形结构的话,那么它主要角色有: 1)树干角色(Component):该角色是一个抽象类,它定义了一些操作增删树叶(Leaf)的操作。 2)树枝角色(Composite):树枝上有很多树干,树枝也是树干的一种。
树叶
...te模式看成是树形结构的话,那么它主要角色有: 1)树干角色(Component):该角色是一个抽象类,它定义了一些操作增删树叶(Leaf)的操作。 2)树枝角色(Composite):树枝上有很多树干,树枝也是树干的一种。
钢板弹簧 ; 叶片弹簧 ; 机 板弹簧 ; 机 片簧
月桂叶 ; 香叶 ; 植 月桂树叶 ; 月桂
枫叶 ; 枫树叶 ; 加拿大枫叶 ; 马普
A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem. The leaves and stem together form the shoot. Foliage is a mass noun that refers to leaves collectively.Typically a leaf is a thin, dorsiventrally flattened organ, borne above ground and specialized for photosynthesis. Most leaves have distinctive upper (adaxial) and lower (abaxial) surfaces that differ in colour, hairiness, the number of stomata (pores that intake and output gases) and other features. In most plant species, leaves are broad and flat. Such species are referred to as broad-leaved plants. Many gymnosperm species have thin needle-like leaves that can be advantageous in cold climates frequented by snow and frost. Leaves can also come in other shapes and forms such as: scales in certain species of conifers; some are not above ground (such as bulb scales); succulents plants have thick juicy leaves; and some leaves are without major photosynthetic function (consider for example cataphylls, and spines). Furthermore, several kinds of leaf-like structures found in vascular plants are not totally homologous with them. Examples include flattened plant stems (called phylloclades and cladodes), and phyllodes (flattened leaf stems), both of which differ from leaves in their structure and origin. Conversely, many structures of non-vascular plants, and even of some lichens, which are not plants at all (in the sense of being members of the kingdom Plantae), do look and function much like leaves. The primary site of photosynthesis in most leaves (palisade mesophyll) almost always occurs on the upper side of the blade or lamina of the leaf but in some species, including the mature foliage of Eucalyptus palisade occurs on both sides and the leaves are said to be isobilateral.