【单选题】The main purpose of the second paragragh is to ______.
A.
describe the steps to train a robot
B.
advertise a new type of robot
C.
instruct housewives how to operate a robot
D.
suggest making use of a robot in the house
【单选题】下列有关基础代谢率的叙述,哪一项是错误的
【单选题】放大器引入负反馈后,当输入信号一定时,用电压负反馈能稳定输出电压,用电流负反馈能稳定输出电流,使输出信号的波动大大减小,从而维持放大倍数:
【单选题】符合血细胞发育过程中形态变化一般规律的是
【单选题】What may be the purpose of writing this text?
A.
To call for the reduction of train fares.
B.
To advertise the rail transport in the UK.
C.
To introduce various rail companies in the UK.
D.
To give advice on one way of transport in the UK.
【单选题】The original purpose of Haile's setting up his club and team is to ______.
A.
train those young runners
B.
select top runners for the national team
C.
make money from running them
D.
do what he could for his country and his fellows