1、题目14:在等比数列{an}中,已知a7·a12=5,则a8·a9·a10·a11=( )

A. 　cold

B. 　fever

C. 　cough

D. 　toothache

A. 4

B. 3

C. 2

D. 1

A. 　told

B. 　is told

C. 　will tell

D. 　was going to tell

A. 　going over

B. 　went over

C. 　go over

D. 　to go over

A. 　exercises

B. 　problems

C. 　skills

D. 　rules

A. 　clean

B. 　cleaned

C. 　have cleaned

D. 　am cleaning

A. 　in style

B. 　in common

C. 　in need

D. 　/

A. 　in trouble

B. 　in style

C. 　in order

D. 　/

A. 0

B. 1

C. 2

D. 3

A. 　pick it up

B. 　put it on

C. 　give it out

D. 　take it off