单选题If the measures of the angles of a triangle are in the ratio of 3: 4: 5, what is the measure of the smallest angle of the triangle?A 25B 30C 45D 60E 75

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单选题

If the measures of the angles of a triangle are in the ratio of 3: 4: 5, what is the measure of the smallest angle of the triangle?

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更多“If the measures of the angles of a triangle are in the ratio”相关问题

第1题：

Cross curves of stability show which of the following？
A.The righting arms at various angles of inclination and displacement
B.The metacentric height at large angles of heel
C.The height of the center of buoyancy at various angles
D.The metacentric radius at various displacements

正确答案：A
第2题：

GM cannot be used as an indicator of stability at all angles of inclination because ______.
A.M is not fixed at large angles
B.there is no M at large angles
C.G is not fixed at large angles
D.there is no G at large angles

正确答案：A
GM值不能用于表示船舶所有倾斜角的稳性因为在大的横倾角时M点不是固定点。
第3题：

腹股沟（海氏）三角（Hesselbach triangle）：

正确答案:位于腹壁下部，由腹直肌外侧缘、腹股沟韧带和腹壁下动脉围成的三角形区域，称为腹股沟（海氏）三角。
第4题：

问答题
If there are only red, blue, and green marbles in a jar, what is the ratio of red to blue marbles?　 (1) The ratio of red to green marbles is 2:3.　 (2) The ratio of green to blue marbles is 6:5.

正确答案： C
解析：
题目中含三个未知量，（1）、（2）条件相结合可以计算红色和蓝色珠子的比例，两个条件无法单独决定，故本题选C项。
第5题：

单选题
The vertical distance between G and M is used as a measure of（）.
A
stability at all angles of inclination
B
initial stability
C
stability at angles less than the limit of positive stability
D
stability at angles less than the downflooding angle

正确答案： D
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
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9题：

单选题
GM cannot be used as an indicator of stability at all angles of inclination because（）.
A
M is not fixed at large angles
B
there is no M at large angles
C
G is not fixed at large angles
D
there is no G at large angles

正确答案： B
解析：暂无解析
第10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11题：

单选题
Under tropical conditions, control valves have fully opened, but the room still hot.What measures can be taken in such a case?（）
A
Keep the plant running all time
B
Start another blower
C
Increase the ratio of circulated to fresh air
D
Reduce the seawater flow to the condenser

正确答案： D
解析：暂无解析
第12题：

填空题
The ratio of a to b is the same as the ratio of 1.4 to 7. If a＝14, what is the value of b?____

正确答案： 70
解析：
因为a÷b=1.4÷7，当a=14时，经计算b=70。
第13题：

Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a ______.
A.red triangle with the letter R
B.white triangle with the letters RG
C.green square with the letter G
D.white square with the letters GR

正确答案：C
第14题：

病害三角（disease triangle）

正确答案: 需要有病原生物、寄主植物和一定的环境条件三者互相配合才能引起侵染性病害的关系，又称为“病害三要素”。
第15题：

Which of the following is the definition of CAS latency？（）
- A、 CAS latency is the ratio between the column access time and the clock cycle time.
- B、 CAS latency is the ratio between the row access time and the clock cycle time.
- C、 CAS latency is the ratio between the column access time and the data burst transfer time.
- D、 CAS latency is the ratio between the row access time and the data burst transfer time.
正确答案:A
第16题：

多选题
Triangle PQR is isosceles and ∠PQR measures 50°. Which of the following could be the measure of ∠PRQ? (Indicate all of the answer choices that apply.)
A
60°
B
65°
C
80°
D
100°
E
130°

正确答案： D,E
解析：
因为⊿PQR为等腰三角形，所以当∠PQR为顶角时，∠PRQ=65°；当∠PQR为底角时，∠PRQ=80°，故本题选择BC。
第17题：

单选题
Entering from sea,a daymark on the port side of the channel would be indicated on a chart by a（）.
A
red triangle with the letter R
B
white triangle with the letters RG
C
green square with the letter G
D
white square with the letter GR

正确答案： B
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
If the compression ratio is increased on any diesel engine, （）
A
the expansion ratio will decrease
B
combustion will be slowed down
C
thermal efficiency will decrease
D
thermal efficiency will increase

正确答案： B
解析：暂无解析
第20题：

单选题
For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?（）
A
An increase in compression ratio will increase the ignition lag
B
An increase in compression ratio will decrease the ignition lag
C
A decrease in compression ratio will decrease the ignition lag
D
A decrease in ignition lag will increase the compression ratio

正确答案： C
解析：暂无解析
第21题：

单选题
The ratio of the height of a vessel’s rudder to its width is referred to as the（）.
A
aspect ratio
B
constriction ratio
C
rudder ratio
D
steering ratio

正确答案： B
解析：暂无解析
第22题：

单选题
All of the following are part of the fire triangle EXCEPT （）.
A
fuel
B
oxygen
C
heat
D
electricity

正确答案： C
解析：暂无解析
第23题：

单选题
The ratio of r to s is 3 to 4. The ratio of s to t is 2 to 9. What is the ratio of r to t?
A
1 to 3
B
1 to 6
C
2 to 9
D
3to10
E
4 to 5

正确答案： B
解析：
根据题干r/s=3/4，s/t= 2/9，所以s=(2t)/9。因为r/s=3/4，r/s=r/{(2t)/9}=3/4，(9r)/(2t)=3/4，所以r/t=(3/4)(2/9)=1/6，故选B。
第24题：

单选题
Which statement about an estimated position is TRUE?（）
A
It is more reliable than a fix based on radar bearings
B
It may be based on a single LOP or questionable data
C
When a 3-LOP fix plots in a triangle，the center of the triangle is the estimated position
D
It is usually based on soundings

正确答案： C
解析：暂无解析

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单选题If the measures of the angles of a triangle are in the ratio of 3: 4: 5, what is the measure of the smallest angle of the triangle?A 25B 30C 45D 60E 75

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