Some officials believe bird flu spread to Africa mainly due to ______.

A． the trade of farm birds

B． the waste and liquids of infected birds

C． the fact that sortie people touched sick birds or any infected part of sick birds

D． the virus changed and started spreading in some new forms

[单选题]The Chinese government has taken ________ to prevent the spread of the bird

[单选题]C．One day when some government officials were rebuilding a barn（谷仓），they found a mouse hole in a corner and used smoke to force the mice inside the hole to come out.A while later they indeed saw mice running out,one after another.Then,everyone though

[单选题]Some scientists believe that hibernation is started by ______.A． over-eatingB． calcium depositsC． a body chemicalD． a lack of water

[单选题]Somepeoplebelievethatsinceoilisscarce,the____ofthemotorindustryisuncertain.A．)terminalB)benefitC)fateD)estimate

[单选题]A．ccording to Federal health officials ,the fact that more West Nile cases have been reported indicates that[A] more states are affected.[B] the average age dropped drastically.[C] health officials are more alert to the disease.[D] the epidemic seaso

[单选题]What do people generally believe about the way human minds work?A． People think in words and sentences.B． Human ideas are translated into symbolsC． People think by connecting threads of ideas.D． Human thoughts are expressed through pictures.

[单选题]What do people generally believe about the way human minds work ?A． People think in words and genternces.B． Human ideas are translated into symbolsC． People think by connecting threads of ideas .D． Human thoughts are expressed through pictures.

[主观题]Iam_______tobelievethathewon‘tcomebacktoseehiswifeagain.A.inclinedB.puzzledC.accompaniedD.performed

[单选题]Some argue that by their ______nature, these elite places of learning should not be easily accessible.A． veryB． exactlyC． exactD． just

[单选题]H．arry didn't believe Jack because______．A．Jack often made jokes with himB．Mike was much shorter and thinner than heC．Mike was new in the classD．he didn't know Mike at all