单选题In any right triangle, the acute angles are ______.A EqualB Adjacent anglesC Vertical anglesD Complementary anglesE Supplementary angles

题目
单选题
In any right triangle, the acute angles are ______.
A

Equal

B

Adjacent angles

C

Vertical angles

D

Complementary angles

E

Supplementary angles

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更多“In any right triangle, the acute angles are ______.”相关问题

  • 第1题：

    Coral atolls，or a chain of islands at right angles to the radar beam，may show as a long line rather than as individual targets due to ______.

    A.the effects of beam width

    B.limitations on range resolution

    C.the pulse length of the radar

    D.the multiple-target resolution factor


    正确答案：A

  • 第2题：

    In the navigational triangle，the angle at the elevated pole is the ______．

    A.meridian angle

    B.altitude

    C.right ascension

    D.azimuth angle


    正确答案：A

  • 第3题：

    单选题
    A mooring line leading at nearly right angles to the keel is a（）.
    A

    bow line

    B

    breast line

    C

    spring line

    D

    stern line


    正确答案： B
    解析： 暂无解析

  • 第4题：

    单选题
    In relation to the turning circle of a ship , the term advance means the distance（）.
    A

    gained at right angles to the original course

    B

    gained in the direction of the original course

    C

    moved sidewise from the original course when the rudder is first put over

    D

    around the circumference of the turning circle


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    Which of the files listed is tapered on three sides and is used to file acute internal angles?（）
    A

    Mill

    B

    Round

    C

    Square

    D

    Triangular


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    If the measures of the angles of a triangle are in the ratio of 2：3：4, what is the measure of the smallest angle of the triangle?
    A

    20

    B

    25

    C

    30

    D

    40

    E

    45


    正确答案： A
    解析：
    Let 2x, 3x, and 4x represent the measures of the three angles. 2x+3x+4x=180, x=20. Hence 2x=40.

  • 第7题：

    单选题
    Which one of the following is a counterexample to the statement “If two angles are supplementary, then they are right angles?”
    A

    If two angles are complementary, then they are not right angles.

    B

    If two angles are fight angles, then they are supplementary.

    C

    If two angles are not supplementary, then they are not right angles.

    D

    If two angles are supplementary, then one could measure 100° and one could measure 80°.

    E

    If two angles are not fight angles, then they are not supplementary.


    正确答案： E
    解析：
    A counterexample is an example that proves a statement to be false. Answer D shows one example where angles are supplementary but are not right angles, since one measures 100° and the other measures 80°.

  • 第8题：

    单选题
    The largest waves (heaviest chop) will usually develop where the wind blows（）.
    A

    at right angles to the flow of the current

    B

    against the flow of the current

    C

    in the same direction as the flow of the current

    D

    over slack water


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    In relation to the turning circle of a ship , the term transfer means the distance（）.
    A

    gained in the direction of the original course

    B

    gained at right angles to the original course

    C

    the ship moves sidewise from the original course awayfrom the transfer means the distance

    D

    around the circumference of the turning circle


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    The right to limit liability in connection with the ship（）also extended to Charterers and any person interested in or in possession of the vessel and，in particular，any manager or operator of her.
    A

    has

    B

    takes

    C

    is

    D

    makes


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    In any right triangle, the acute angles are ______.
    A

    Equal

    B

    Adjacent angles

    C

    Vertical angles

    D

    Complementary angles

    E

    Supplementary angles


    正确答案： E
    解析：
    Since the right angle measures 90 degrees, the sum of the two acute angles must be 180-90=90 degrees.

  • 第12题：

    单选题
    The distance a vessel moves at right angles to the original course，when a turn of 180°has been completed，is called the（）.
    A

    advance

    B

    pivoting point

    C

    tactical diameter

    D

    kick


    正确答案： B
    解析： 暂无解析

  • 第13题：

    When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to ______.

    A.the meridian through the object of the bearing

    B.the meridian through the ship's position

    C.the meridian midway between the ship and the object

    D.any meridian


    正确答案：B

  • 第14题：

    The line leading at right angles to the （）(中线) from the forecastle to the shore is called the forward breast line.

    • A、draft
    • B、waterline
    • C、centerline
    • D、abeam

    正确答案:C

  • 第15题：

    单选题
    A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
    A

    dike

    B

    revetment

    C

    cutoff

    D

    crib


    正确答案： A
    解析： 暂无解析

  • 第16题：

    单选题
    Mariners are reminded that they should proceed in the general direction indicated by the arrows or，if（）a lane，they should do so as nearly as practicable at right angles to it.
    A

    cross

    B

    crossing

    C

    crossed

    D

    crosses


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    （） connected to the moving tiller will bring the floating lever pivot and the lever into line at right angles to the screw shaft axis.
    A

    A cut-off lever

    B

    A swivel block

    C

    A cross-head

    D

    A driving gear


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    The three interior angles of a triangle have measures of a°, a°, and b°. If b = 80, what is the value of a?
    A

    30

    B

    40

    C

    50

    D

    60

    E

    100


    正确答案： B
    解析：
    因为三角形内角之和为180度，因此可得出a + a + b = 180，已知b=80，那么2a+80=180，a=50。

  • 第19题：

    单选题
    To ensure the best results during the Mediterranean moor，the chains should（）.
    A

    be crossed around the bow

    B

    tend out at right angles to the bow

    C

    tend aft 60°from each bow

    D

    tend forward 30°on either bow


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.
    A

    The objects lie in a straight line

    B

    The vessel is inside of a triangle formed by the objects

    C

    The vessel is outside of a triangle formed by the objects

    D

    A circle will pass through your position and the three objects


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    In a traffic separation scheme，when joining a traffic lane from the side，a vessel shall do so（）.
    A

    only in case of an emergency or to engage in fishing within the zone

    B

    as nearly as practical at right angles to the general direction of traffic flow

    C

    at as small an angle as possible

    D

    only to anchor within the zone


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    Flexible hose under pressure in a hydraulic system will （）.
    A

    tend to twist about its long axis

    B

    expand in length and in diameter

    C

    contract in length and expand in diameter

    D

    flex at right angles to the applied pressure


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    In a traffic separation scheme, when joining a traffic lane from the side, a vessel shall do so（）.
    A

    at as small an angle as possible

    B

    as nearly as practical at right angles to the general direction of traffic flow

    C

    only in case of an emergency or to engage in fishing within the zone

    D

    never


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    In a married falls rig at the after end of a hatch , a boom is rigged in a fore and aft line through its heel . Stresses on the outboard guy will be least if the guy is made fast at a point（）.
    A

    abreast the heel

    B

    at right angles to the boom when viewed from above

    C

    aft of the heel

    D

    forward of the spiderband


    正确答案： C
    解析： 暂无解析

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