There are only hinge joints in a truss.

A、fixed support

B、link support

C、fixed dirction support

D、hinge support

A、Myocardium preferentially gets energy from oxidation of fatty acids.

B、Red blood cells produce ATP only through glycolysis.

C、During starvation, the brain gets energy only by glucose oxidation.

D、Gluconeogenesis also occurs in kidney.

E、Liver is the hinge of metabolism in the body.

Why does the author say that Disney's case may "hinge on the 'mommy memo'" (para. 5)？

A．Because Disney has been barred from introducing further evidence.

B．Because the documents related to Disney's merchandise sales cannot be found.

C．Because this might be the only document revealing Disney's original attitude.

D．Because Slesinger daughter faithfully recorded Jefferds' words.

A、Link BC and Link CD connected by Hinge C

B、Link AB and Link AC connected by Hinge A

C、Link BF and Link FD connected by Hinge F

D、Link BE and Link BF connected by Hinge B

In order to find the rotation of the section to the left of hinge C shown in the figure, the virtual force state for the unit load method shall be taken as:

A、

B、

C、

D、

A.saddle joint

B.pivot joint

C.hinge joint

D.ellipsoidal joint

E.plane joint

The hinge A can move in vertical direction in the system as the figure shown, which means that the length of member AB and AC can change but keeping in equal. The position of other joints can’t be changed. If the structure is a stable system, which of the following is correct. ()

A、h2 m

B、h4 m

C、h4 m or h

D、h2 m and h