1、【题目】Bats fly, rather than glide, and thus are the only mammals capable of true flight.

选项：

A.straight

B.safe

C.real

D.rapid

答案：

C

解析：

暂无解析

1、【题目】In 1974 Henry Aaron broke Babe Ruth's monumental lifetime record of 714 home runs.

选项：

A.archaic(old,antique)

B.degrading(discredit)

C.outstanding

D.entire

答案：

C

解析：

暂无解析

1、【题目】The Salk vaccine is a major factor in the fight to eradicate polio.

选项：

A.completelydestroy

B.carefullydisguise

C.sustain

D.contain

答案：

A

解析：

暂无解析

1、【题目】Although the Carbon 14 method of dating old objects is not foolproof , it is the best method available at present

选项：

A.whollyoperational

B.entirelyserviceable

C.fullyreliable

D.completelysafe

答案：

C

解析：

暂无解析

1、【题目】Thefirstpaperwasmadefromthebarkofthemulberrytree.

选项：

A.driedwood

B.outercovering

C.syrup(sirup)

D.root

答案：

解析：

1、【题目】AlthoughtheCarbon14methodofdatingoldobjectsisnotfoolproof,itisthebestmethodavailableatpresent

选项：

A.whollyoperational

B.entirelyserviceable

C.fullyreliable

D.completelysafe

答案：

解析：

1、【题目】Comets are still regarded with awe by some people.

选项：

A.wonder

B.concern

C.resentment

D.detachment

答案：

A

解析：

暂无解析

1、【题目】Thewheelsofthefirstroadvehicleswerefashionedfromcrudestonedisks.

选项：

A.hand-carved

B.roughlymade

C.flat

D.heavy

答案：

解析：