The empennage is also called the tail section（）

A．Empennage

B．Propeller

C．Fuselage

D．Undercarriage

【填空题】Lesson 2 课后作业-Vocabulary Practice V Complete the following sentences by filling the blanks with the words or phrases given below. aileron rudder flaps yaw powerplant roll empennage landing gear 1._______are a type of high-lift device used to increase the lift of an aircraft wing at a given airspeed. 2. _______is a vertical airfoil pivoted from the horizontal stabilizer of an aircraft, for controlling movement around the vertical axis. 3. An ______ is a hinged flight control surface usually forming part of the trailing edge of each wing of a fixed-wing aircraft, which controls the movement of the aircraft around its longitudinal axis. 4. The undercarriage of an aircraft and may be used for either takeoff or landing is known as_______ 5. The tail or tail assembly, also known as_________, is a structure at the rear of an aircraft that provides stability during flight. 6. Rotation around the vertical axis is called ______ . 7. Rotation around the front-to-back axis is called______ . 8. The ______ of an aircraft may be an engine and propeller combination or a jet engine.

A、is also called a coupon bond.

B、is also called a zero-coupon bond.

C、is also called a fixed-payment bond.

D、is also called a corporate bond.

A．bill

B．tail

C．wing

D．toe

The lower section of a piston is called the ______.

A.land

B.crown

C.skirt

D.plate

The upper section of a piston is called the _______.

A.land

B.skirt

C.crown

D.plate

The lower section of a piston is called the ______.

A.land

B.skirt

C.crown

D.plate

What is the female section of a tool joint called？

A.Stem

B.Pin

C.Box

D.Stand