问题
选择题
Waves of red light are about twice as long as _______ of blue light.
A.those
B.that
C.it
D.Ones
答案
答案:A
题目分析:考查指示代词。句意:红光的波长是蓝光波长的两倍长。在比较级中,指代比较对象时,单数用that,复数用those,这里的比较对象是waves,故选A。
Waves of red light are about twice as long as _______ of blue light.
A.those
B.that
C.it
D.Ones
答案:A
题目分析:考查指示代词。句意:红光的波长是蓝光波长的两倍长。在比较级中,指代比较对象时,单数用that,复数用those,这里的比较对象是waves,故选A。