Forwarded from xtl soft
Forwarded from xtl soft
已知点A,B分别是互不垂直的两条异面直线a,b上的点,且直线AB与a,b均垂直,P∈a,Q∈b,若直线PQ与AB所成锐角θ为定值,则PQ的中点M的轨迹是( )
Anonymous Quiz
37%
A.椭圆
29%
B.抛物线
22%
C.圆
12%
D.线段
Nearly 2000 students were applying ___ just 12 places at the conservatory.
Anonymous Quiz
87%
for
7%
to
6%
in
________ it is today!
Anonymous Quiz
29%
A. What fine weather
49%
B. What a fine weather
8%
C. How a fine weather
14%
D. How fine a weather
weather 是不可数名词,前面不能有不定冠词。英语中经常考查的不可数名词有 work, news, adivice, information 等。
Without enough pollinators, many of our favorite fruits and vegetables ___ more expensive and harder to find.
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42%
would have become
5%
have become
53%
would become
Some beekeepers have reported ___ 20-50 percent of their colonies.
Anonymous Quiz
62%
losing
11%
have lost
15%
lost
12%
to lose