建筑工程的发包单位与承包单位应当依法（），明确双方的权利和义务。A.订立书面合同B.达

Under some conditions, a single bacterium can grow seventeen million disease-carrying organisms in just eight hours.

A、/

B、into

C、from

D、up

was interruptedafter 30 min. Under these conditions, which of the fol-lowing genes would definitely NOT be transferredfrom the donor bacterium to the recipient bacterium？

A.Gene A

B.Gene R

C.Gene G

D.Gene X

Some medical conditions can often cure themselves______, without medical intervention.

A．deliberately

B．spontaneously

C．consciously

D．intentionally

Under (favor) ______ conditions, we can keep our promise and even finish the project ahead of time.

Under what conditions can the EPA put off its action？

A．No new regulations.

B．No new president and Congress.

C．No appropriate technology.

D．No swift proceeding.

Under what conditions can the EPA put off its action？

A．No new regulations.

B．No new president and Congress.

C．No appropriate technology.

D．No swift proceeding.

Under what conditions can the EPA put off its action？

A．No new regulations.

B．No new president and Congress.

C．No appropriate technology.

D．No swift proceeding.

Some medical conditions can often cure themselves ______, without medical intervention.

A．deliberately

B．spontaneously

C．consciously

D．intentionally