拟建某教学楼，与概算指标略有不同。概算指标拟定工程外墙面贴瓷砖，教学楼外墙干挂花岗石。该地区外墙面瓷砖的预算单价为80元/m2，干挂花岗石的预算造价为280元/m2。教学楼工程和概算指标拟定100 m2建筑面积中外墙面工程量均为80 m2。概算指标土建工程直接工程费单价为2 000元/m2，措施费为170元/m2。则拟建教学楼土建工程直接工程费单价为（）元/m2。
A．1760
B．2160
C．2200
D．2330
参考答案：B
解析：
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| Many language learners think their pronunciation is good enough because their teacher doesn't correct them too often or because other students can _1_ them. Pronunciation is the area which is _2_ the least attention to in language learning. Most teachers _3_ just let their students speak and stop them 4 they say something completely wrong. Working on each student's pronunciation in class is just 5 . Also, the students who are 6 at pronunciation may be afraid that it will embarrass their classmates if they help 7 their mistakes. If you believe your pronunciation is good enough to 8 because it is good enough for your teacher and other students, you may be 9 when you actually go to a foreign country. One of my friends was the best student in his 10 class in Poland. When he went to America, he found Americans didn't understand 11 of what he said. Your pronunciation may still be quite 12 that of a native speaker. If this is the 13 , other people will find it 14 to understand what you're saying and will not be comfortable with you. 15 , don't think you can communicate in a foreign language 16 you've tested your skills on real native speakers. 17 for native or nearnative pronunciation so that people you talk to can communicate with you 18 . In order to achieve this goal, there's 19 that you will need to start thinking about pronunciation and 20 time on it. | ||||
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