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【单选题】
PM2.5是空气质量的一个极关键指标，可遗憾的是，长期以来，我们的空气质量监测一直只检测直径在10微米以下的颗粒(PM10)，未将PM2.5纳入，而实际上，PM10大多难以穿越人体的防御系统进入到体内，远比PM2．5危险性小。我们城市中常见的灰霾天气．PM2.5往往是主因，这些还不到头发丝粗细1/20的颗粒物，它在大气中停留时间长、输送距离远，因而对空气质量和能见度有重要影响。不仅如此，PM2.5堪称人体健康的一大杀手，它成分复杂，多含有毒有害物质，由于颗粒太小，它能穿过鼻腔中的鼻纤毛，直接进入肺部，甚至渗进血液，从而引发包括心脏病、动脉硬化、肺部硬化、肺癌、哮喘等各种疾病。 根据这段文字，理解不正确的是：A.
PM2.5是指大气中直径不大于2.5微米的颗粒物
B.
PM2.5比PMlO更容易导致城市出现灰霾天气
C.
PMlO对空气质量有影响而对人体无害
D.
应尽快将PM2.5列入空气质量监测范围
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【单选题】有一些字简化时采取同音替代的方法,导致意思区分不开,区别性差,大约有3%至5%的简化字会引起这种混乱。
A.
3%至5%
B.
7%至9%
C.
1%至2%
D.
10%至15%
【简答题】He uses ______ least a dozen balls per round because they
lose their shape after he hits them.
【多选题】Why are Felix, Agatha, and De Lacey so poor?
A.
They were born poor.
B.
Safie's father stripped them of their fortune.
C.
The French court took their fortune and exiled them from France for helping Safie's father escape from prison.
D.
Felix spent the family's money courting Safie.
【单选题】According to SustainAbility, what is the reason for the appearance of so many different definitions for globalization?
A.
There's no authoritative definition for globalization.
B.
Others' definitions are more convincing than professor Levitt's.
C.
Different people have different ideas on globalization.
D.
Things are different after two decades' time.
【判断题】Instantly, from the dark holes all round, there was a frenzied rush of Jews . This sentence uses a transferred epithet and a metaphor.
A.
正确
B.
错误
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