Which of the following plane figures have reflectional symmetry?

下列哪些平面图形具有射对性质？

The term actinomorphy is generally used to describe radial symmetry in flowers.

常用“辐射对”描述辐射状的花。

The human body has a symmetry that is basic to our sense of beauty.

人体的对性构成我们审美观的基础。

The butterfly is an example of symmetry.

蝴蝶是结构完全对的一个例。

A kite is a quadrilateral with one line of symmetry.

风筝是个有一条对线的四边形。

Mirror symmetry of petroleum occurrences is due to multistage-accumulation and remigration.

油气地球化学特徵性相似性与成藏多期性及油气运移对性密切相关。

The nuclide chart involves electron, positron, antiproton, antineutron, photon to exhibit the symmetry of mass and charge ideally.

该核素图、正、质、中和光收录在内，完美地表现了质量和荷的对性。

Beds of iris were set out in perfect symmetry around a pool filled with water lilies.

大片大片的蔓蒲花非常对地长在开满水仙花的池塘四。

Hadorwould traditionary symmetry encryption and publicity secret key mode band together, have two both the virtue.

统的对性加密与公开密钥方法结合起来，兼备了两者的优点。

Borrower of book - those mutilator of collections,spoiler of the symmetry of shelves,and creator of odd volume.

借书者□□是为珍藏本的破坏者、书本排列次序的捣乱者、零星残书的创造者。

Towering in close symmetry, these basalt columns near Fingal’s Cave form the base of the Scottish island of Staffa.

极端的地球图片。高耸的密切的对性，这些玄武岩园柱状物附近Fingal的洞穴形式的基础上苏格兰岛的Staffa 。

Towering in close symmetry, these basalt columns near Fingal's Cave form the base of the Scottish island of Staffa.

极端的地球图片画廊。高耸的密切对性，这些玄武岩圆柱附近的芬戈尔洞形成的基底苏格兰岛屿的斯达法岛。

Some properties of adjoint matrix are discussed. The properties are symmetry, antisymmetry, positive definite, positive semi-definite, orthogonal and characteristic value.

摘要讨论了伴随矩阵在对、对、正定、半正定、正交、相似和特徵值等方面的性质。

The helix has been lengthened,the scapha exposed,the normal ear reduced,the constricted ear augmented and two sides ear have become symmetry.

结果15例患者的耳廓复合组织片全部成活,耳轮延长,耳舟显露,从而使双耳基本对。

The shape of cross-section is an ellipse folded in half through one symmetry axis, and the axis keeps perpendicular with pinacoid-view.

断面形状为沿对轴对折的椭圆，此对轴始终垂直于轴截面，其方向与平面图上的流道中线无关。

It has been described as work that “relies on geometry and symmetry, fusing curvilinear shapes into pixilated, cleverly impressionistic jigsaw puzzles”.

他的作品被作「依讬几何和对，曲线融入搞怪之中，机智运用印象主义的智力拼图」。

The observed deltas are highly two-dimensional in planform, adopting palmated structures which retain throughout their evolution a high degree of mirror symmetry.

实验观察到的三角洲，为一高度二维蹼狀发展且镜面对的构造。

Binucleated granulocyte appeared in the stage from promyelocyte to neutrophilic band form with mostly symmetry mirror image characteristics in size and shape.

双核粒细胞在早幼至杆状核阶段均见存在,多具有大小形状对的八字形特点。

With the concavity and integrability of sublinear terms near zero,the symmetry results for a class of sublinear elliptic equations are given by making use of the moving-plane method.

本文利用次线性项在零点附近的凹性和可积性，用移动平面法给出了一类次线性椭圆方程正解的对性.

Abstract With the concavity and integrability of sublinear terms near zero,the symmetry results for a class of sublinear elliptic equations are given by making use of the moving-plane method.

摘 要 本文利用次线性项在零点附近的凹性和可积性，用移动平面法给出了一类次线性椭圆方程正解的对性.