要做两个相似的三角架,其中一个三角架的三边长分别是4、5、6,若另一个三角架的最

题型:选择题

问题:

要做两个相似的三角架,其中一个三角架的三边长分别是4、5、6,若另一个三角架的最短边长是2,则另两边的长分别是(   )
A.2.5和3
B.3和4.5
C.1.5和2.5
D.3和4
考点:相似三角形的性质
题型:选择题

如图,对于电能表面板上的一些参数的理解,下列说法错误的是

[ ]

A.此时电能表的读数为120.7度

B.“220V”是指这个电能表应该在220伏的电路中使用

C.“10(20)A”是指这个电能表使用时正常工作电流为10安或20安

D.“600revs/kW·h”是指用电器每消耗1千瓦时电能,电能表的转盘转过600转

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断面皮部散有多数黄棕色点状树脂道()

A.防风

B.板蓝根

C.延胡索

D.人参

E.龙胆

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The appearance of the island when I came on deck next morning was altogether changed. Although the breeze had now utterly failed, we had made a great deal of way during the night, and were now lying becalmed about half a mile to the southeast of the low western coast. Grey-colored woods covered a large part of the surface. ③This even tint was indeed broken up by streaks of yellow sandbreak in the lower lands, and by many tall trees of the pine family, out-topping the others — some singly, some in clumps, but the general coloring was uniform and sad. ④The hills ran up clear above the vegetation in spires of naked rock. All were strangely shaped, and the Spy Glass, which was by three or four hundred feet the tallest on the island, was likewise the strangest in configuration, running up sheer from almost every side, ⑤and then suddenly cut off at the top like a pedestal to put a statue on.

文中④段画线部分翻译正确的是()。

A.每一座山上都有光秃秃的岩石清晰地暴露在高山植被的顶端。

B.每一座山峰都在裸露的岩石中升到植被的顶端。

C.每一座山峰都清晰地升到裸露的岩石的植被上。

题型:选择题

斯宾塞提出的教育目的是()

A.多元化

B.个体本位

C.完满生活

D.社会本位

题型:选择题

在深度为5的完全二叉树中,度为2的结点数最多为上 【1】

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