【单选题】The five rings on the Olympic flag ______ the five continents that are joined together in the Olympic s.
【判断题】更换卤素灯泡时,可以用手出摸灯泡部位。 ( )
【简答题】(This is) the athlete (whom) everyone (says) will win the (gold)medal at the winter Olympic s.
【单选题】Which sentence is not correct according to the text? ______.
A.
In dense WDM, the value of ‘dense’ may different for different persons
B.
The core has a higher refractive index than the cladding in a fiber
C.
A receiver needs to de-multiplex a singal when receives it
D.
The main issue on a fiber in transmission is controlling crosstalk effects
【单选题】What is this report mainly about?
A.
Phone inquires about hotel bookings for the 2008 Olympic s.
B.
Beijing Hotel is one of the most top hotels in the capital.
C.
Beijing will host the 2008 Olympic s.
D.
Visitors from all over the world will come to China for the s.
【单选题】在递增负荷运动中,引起机体通气量急剧增加的一个重要因素是
【判断题】发展新能源汽车的主要有两个原因:环境污染、温室效应。