材料在空气中吸收水分的性质称为吸水性。 （)

The main sources of salt in our diet are______.

A．home-made food and packaged food

B．restaurant food and saltshakers

C．home-made food and saltshakers

D．restaurant food and packaged food

The title that best expresses the main idea of this passage is ______.

A．Science and Agriculture

B．Eliminating Starvation

C．Improving Our Diet

D．Combating Malnutrition

In what way does the typical Western diet do harm to our health？

A．It makes people eat little or no foods and meat.

B．It is high in salt without fried foods and meat.

C．It can block blood vessels with the wrong type of fat.

D．It leads to the connection between foods and heart attack.

What is the main message of this text？

A．That the salt scare is not justified.

B．That the orgin of hypertension is now found.

C．That the moderate use of salt is recommended.

D．That salt consumption is to be promoted.

What is the main message of this text？

A．That the salt scare is not justified.

B．That the orgin of hypertension is now found.

C．That the moderate use of salt is recommended.

D．That salt consumption is to be promoted.

A．up

B．to

C．on

D．over

A．up

B．to

C．on

D．over

A．up

B．to

C．on

D．over

A heart-healthy diet is one that contains______.

A．a low level of sodium.

B．a lot of potassium and calcium.

C．no salt at all.

D．both A and B

A．up

B．to

C．on

D．over