关于工程项目投标文件的送达与签收，表述正确的有（）。

A．education

B．family

C．age

D．gender

Whether a child is interested in learning depends on ______.

A．the content the adult wants the children to learn

B．how pleased the parents are when the children are learning

C．the feedback the parents give to children at an early age

D．the physical health of the children

The word "it" in the last paragraph refers to______.

A．the conclusion you have come to

B．whether age is happy or unpleasant

C．your talks to the old people

D．one's money or one's health

The word "it" in the last paragraph refers to ______ .

A．the conclusion you have come to

B．whether age is happy or unpleasant

C．your talk to the old people

D．one's money or one's health

The word "it" (Line 2, Para. 3) refers to .

A．the conclusion you have come to

B．your talk to the old people

C．whether age is happy or unpleasant

D．one's money or one's health

The word "it" in the last paragraph refers to______.

A．the conclusion you have come to

B．whether age is happy or unpleasant

C．your talk to the old people

D．one's money or one's health

Whether fire ants are pests or not largely depends on their

A．predatory activities.

B．temporal distribution.

C．spreading speed.

D．geographical distribution.

There is no doubt that______.

A．eyes are less used to express overt emotions

B．eyes are usually depicted to indicate a happy face

C．the Japanese is particularly good at detecting "false smiles"

D．the Japanese is good at detecting whether someone is lying