题目
大棚中种植的植物其光合作用会受到多种因素的影响，在下曲线图中，有M、N、O、P、Q五个点，对它们的含义的叙述正确的有（）①M点时，植物叶肉细胞内合成ATP的场所只有线粒体②若适当降低大棚温度，则N点将会向右移动③O点时，限制植物体的光合作用强度的主要因素是光照强度④P点时，若想提高作物产量可以适当补充光照，绿光灯效果最好⑤Q点光照强度时，适当使用二氧化碳发生器可以提高作物产量． A．①④⑤ 37、
The bullet train D106 from
Changsha to Shanghai has a short stop in Quzhou for only one minute．
Named after the letter D, the new
trains run at speeds of 200 to 250 kilometers one hour．This is much faster than Z—type and T—type trains．For example, it used to take people l2 hours to travel from Shanghai
to Beijing．But now it only takes l0 hours．The most interesting part of the bullet trains is the revolving(旋转)seats．People can adjust(调整)their seats as they like, so that it is easy for you to talk with
others around you face to face．The new trains run
between big cites．They make the long trips much faster
and more comfortable．
However, many passengers still won’t choose the bullet trains for some
reasons．The ticket prices of the bullet trains are much
higher．For example, a hard seat ticket from Beijing to
Jinan is only 90 yuan for T—type trains．But on the bullet trains all the seats are soft．And they cost 153 to184 yuan．On the other
hand, the bullet trains don’t stop at small stations．
1．Passengers who take the D106 train in Quzhou have to
hurry up because ．
A．it stops for three minutes
B．there are too many passengers
C．it runs too
fast
D．it stops for only one minute
2．What is the most interesting part of the bullet
trains?
A．The hard seats．
B．The revolving seats．
C．The beautiful colors．
D．The train tickets．
3．How long does it take to travel from Shanghai to
Beijing on a bullet train now?
A．12 hours．
B．20 hours．
C．10 hours．
D．5 hours．
4．The bullet trains make the long trips ．
A．faster and more comfortable
B．more dangerous
C．more
boring
D．cheaper
5．Why won’t many passengers
choose the bullet trains?
A．Because the ticket prices are too high．
B．Because they are too crowded．
C．Because they don't stop at small stations．
D．Both A and C．
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