The leading producing area for chemicals and machinery is（).A、The East North CentralB、th

A．The amount of tears can be adapted.

B．Crying affects the feelings.

C．Tears discharge chemicals built up during stress.

D．Crying leads to producing more chemicals in mars.

A．Origen and Embrex will jointly invent machines to increase production.

B．Origen wants to purchase an efficient donor cells injecting machine.

C．Origen has joined hands with Embrex in producing cell-injecting machines.

D．Origen is the leading company in producing embryo-locating machines.

The drug tested on people can______.

A．cause the brain to fix memories

B．stop people remembering their experiences

C．prevent body producing certain chemicals

D．wipe out the emotional effects of memories

Soil that is rich in organic matter______.

A．has nothing nutritious added to it

B．is essential for producing fruit and vegetables

C．contains unused vegetable matter

D．has had chemicals and fertilizers added to it

Soil that is rich in organic matter______.

A．has nothing nutritious added to it

B．is essential for producing fruit and vegetables

C．contains unused vegetable matter

D．has had chemicals and fertilizers added to it

A．Origen and Embrex will jointly invent machines to increase production.

B．Origen wants to purchase an efficient donor cells injecting machine.

C．Origen has joined hands with Embrex in producing cell-injecting machines.

D．Origen is the leading company in producing embryo-locating machines.