The empennage consists of the vertical stabilizer （sometimes known as the fin）, and the horizontal stabilizer（）

A.副翼

B.机翼

C.尾翼

A.100

B.300

C.500

D.200

___ vary from each other slightly or widely and possess their own characteristics, most of them share the same major components including a fuselage, wings, an empennage , landing gear and a power plant

A、airlines

B、vehicles

C、airliners

D、instruments

A.Empennage

B.Propeller

C.Fuselage

D.Undercarriage

The nuclear family ____ two parents (mother and father) and their children.

A: consists of

B: consist of

C: is consisted of

D: consists

Which of the following is NOT characteristic of a tamarin family？

A．A tamarin family consists of Father, Mother and their children.

B．The family life is organized like humans.

C．All the family members share the responsibility in the upbringing.

D．Tamarin brains are big for their size.

The two hemispheres of the brain ______.

A．operate independently of each other

B．work consistently in task fulfillment

C．act in conformity with each other

D．specialize in distinct functions

Which of the following is NOT characteristic of a tamarin family？

A．A tamarin family consists of Father, Mother and their children.

B．The family life is organized like humans.

C．All the family members share the responsibility in the upbringing.

D．Tamarin brains are big for their size.

A.飞机的另一个主要部分是尾翼（也叫尾翼部分）。大多数飞机设计包括一个尾锥，固定面和活动面

B.飞机的另一个主要部分是发动机（也叫动力装置）。大多数飞机设计包括一个尾锥，固定面和活动面

C.飞机的另一个主要部分是机翼（也叫大翼部分）。大多数飞机设计包括一个尾锥，固定面和活动面

D.飞机的另一个主要部分是起落架（也叫起落装置）。大多数飞机设计包括一个尾锥，固定面和活动面