解析 B。解析:在30度、60度、90度的直角三角形中,30度角所对的边是斜边的一半,已知30度角所对边是5米,所以斜边是10米。本题考查数学中特殊直角三角形的性质和英语中数字以及长度单位的表达。选项A、C、D不符合特殊直角三角形的边长关系。反馈 收藏 ...
If the exterior angle of a triangle is 120 degrees and one of the interior opposite angles is 50 degrees, what is the measure of the other interior opposite angle? A. 50 degrees B. 60 degrees C. 70 degrees D. 80 degrees 相关知识点: 试题来源: 解析 C。三角形的一个外角等于与它不...
abut since the rotor is composed of alternating North and South poles, the current produced flows in the opposite direction every 180 degrees of rotation. 但,因为电动子由交替南北极组成,当前导致的流程在相反方向每180个程度自转。[translate]
box, one side face, opposite to the wind shield, of the stainless steel sealed box is provided with an air outlet, the air outlet is inclined towards the air inlet direction, and an angle of 30-60 degrees is formed between the air outlet and the side face provided with the air outlet...
aAs the pole fields pass through the stator, current is electromagnetically produced, but since the rotor is composed of alternating North and South poles, the current produced flows in the opposite direction every 180 degrees of rotation. In other words, the current is “alternating”. 当杆领域...
From the top of a cliff, the angle of depression of the top and bottom of a tower are observed to be45∘and60∘respectively. If the height of the tower is 20 m. Find : (i) the height of the cliff (ii) the distance between the cliff and the tower. ...
Edoardo Mainini. Well-posedness for a mean field model of Ginzburg-Landau vortices with opposite degrees, 2010.E. Mainini, Well-posedness for a mean field model of Ginzburg-Landau vortices with opposite degrees, 2010.E. Mainini, Well-posedness for a mean field model of Ginzburg-Landau ...
Read the full-text online article and more details about "Two Workers Suffer through 66 Degrees of Separation; Bundaberg Businesses Operating at Opposite Ends of the Temperature Spectrum" - News Mail Bundaberg Qld., December 28, 2009News Mail Bundaberg Qld...
(1) Opposite sides of Q are parallel. (2) One of the four angles of Q is 90 degrees. 选项: A、Aif statement (1) ALONE is sufficient to answer the question but statement (2) alone is not sufficient; B、Bif statement (2) ALONE is sufficient to answer the question but statement (1...
aIt is impossible for an observer to manoeuvre to see any rainbow from water droplets at any angle other than the customary one (which is 42 degrees from the direction opposite the Sun). Even if an observer sees another observer who seems "under" or "at the end" of a rainbow, the ...