The perfect pitch ability is genetic.

相似题目

• Pitching is angular motion of the vessel about what axis?（）.

  A . Longitudinal B . Transverse C . Vertical D . Centerline

  查看最佳答案

• The pitch ratio of a propeller is the mean pitch divided by （）.

  A . the propeller diameter B . the propeller radius C . the pitch angle D . the length of helix

  查看最佳答案

• The difference between Fixed pitch propeller (FPP) and Controllable pitch propeller (CPP) is in that（）

  A . for FP, once fitted, the position of the blades can also be changed in operation B . for CP, once fitted, the position of the blades can also be changed in operation C . the CP type has a relatively smaller hub compared with the FP propellers D . the FP type has a relatively larger hub compared with the CP propeller

  查看最佳答案

• The pitch of a propeller is a measure of the（）.

  A . angle that the propeller makes with a free stream of water B . angle that the propeller makes with the surface of the water C . number of feet per revolution the propeller is designed to advance in still water without slip D . positive pressure resulting from the difference of the forces on both sides of the moving propeller in still water without sli

  查看最佳答案

• Pitch is produced by frequency of vibration of the vocal cords. The higher the frequency, the higher the pitch.（）

  A . 正确 B . 错误

  查看最佳答案

• This is the first draft of the book. Please feel perfectly free to（）on it.

  A . cope B . complain C . comment D . confirm

  查看最佳答案

• Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed （）.

  A . apparent slip B . tree slip C . pitch D . propulsive efficiency

  查看最佳答案

• The most powerful signal of stress is a change of pitch on the vowel.（）

  A . 正确 B . 错误

  查看最佳答案

• For vessels with （）, the meaning of the order would include the combination of pitch and revolutions as indicated in ships orders.

  A . fixed pitch propellers B . uncontrollable pitch propeller C . constant pitch propellers D . variable pitch propeller

  查看最佳答案

• The form of past perfect tense should use “have” adding past participle. The first usage of the past perfect tense expresses the idea that something occurred before another action in the past.

  查看最佳答案

• 7 When does the referee give the other team a free kick?A When a player commits a foul.B When the ball goes out of the sides of the pitch.C When the ball leaves the ends of the pitch.

  查看最佳答案

• The rent is reasonable, and ______, the location is perfect.

  查看最佳答案

• The best example of a perfectly competitive industry is:

  查看最佳答案

• 6 When is a corner given according to the football rule? A If the ball goes out of the sides of the pitch. B If the ball leaves the ends of the pitch. C When a player commits a foul.

  查看最佳答案

• _______has the biggest pitch change in the intonation units.

  查看最佳答案

• A) He is too concerned with being perfect<p>B) He loses heart when faced with setbacks</p><p>C) He is too ambitious in achieving goals</p><p>D) He takes on projects beyond his ability</p>

  A、<p>He is too concerned with being perfect</p> B、<p>He loses heart when faced with setbacks</p> C、<p>He is too ambitious in achieving goals</p> D、<p>He takes on projects beyond his ability</p>

  查看最佳答案

• The pilot made a perfect landing on the runway.

  A.起飞 B.降落 C.陆地 D.大洲

  查看最佳答案

• If someone talks about the pitch of a voice, he is referring to its（)

  A.loudness or softness B.highness or lowness C.clarity or vagueness

  查看最佳答案

• The author uses pitch as an example in order to indicate______.

  A．that pitch is not a good example to explain the sex differences in language B．that males should talk in low pitched voices and females in high pitched voices C．that sex differences in language can not be well illustrated D．that sex differences lie in eye or ear of the beholder, rather than in the language

  查看最佳答案

• The major component of the "pitch-black dust"（Line 5, Paragraph 3) should be ______A．iron.

  The major component of the "pitch-black dust"(Line 5, Paragraph 3) should be ______ A．iron. B．magnesium. C．silicate. D．carbon.

  查看最佳答案

• In the long run, all firms in a perfectly competitive industry will operate at the po

  A．marginal cost is minimized B．social welfare is compromised by overextended resources C．marginal cost equals average fixed costs D．marginal cost equals average total cost

  查看最佳答案

• The company' s healthy catering concept is perfectly （) the green and environment

  The company' s healthy catering concept is perfectly () the green and environment-friendly theme of Shanghai World Expo. A. in harmony with B. in harmony C. suit in

  查看最佳答案

• Even if the host develops antibodies, the human immune system is not perfect and in a

  A．A.即使有了抗体，人类的免疫系统仍有缺陷。在某些情况下，免疫系统无法战胜疾病。 B．B.即使人体产生了抗体，人类免疫系统仍有许多欠缺。在一些情况下，免疫系统仍有可能无法战胜这些传染病。 C．C.即使体内产生了抗体，人类免疫系统也不完善。在一些情况下，免疫系统仍可能无法立即战胜传染病。 D．D.即使有了抗体，在某些情况下，人类的免疫系统仍有缺陷，无法战胜疾病。

  查看最佳答案

• The fifth-generation computers, with the ability to think for themselves, _______ and perfected now.

  A．developed B．are being developed C．have developed D．will have been developed

  查看最佳答案