Our goods must be up to export standards b

上海中北制药有限责任公司本年6月有关账户期初余额如下(单位：元)：

账户	期初余额	账户	期初余额
库存现金	8000	短期借款	150000
银行存款	850000	应付账款	70000
原材料	40000	实收资本	1150000
固定资产	300000

本月发生经济业务如下：
(1)6月5日，从银行提取现金3000元，以备发放工资。
(2)6月8日，用转账支票购入生产运输用卡车一辆，计250000元。
(3)6月15日，大唐生物科技有限公司用价值300000元的材料向本公司投资，材料已验收入库。
(4)6月20日，用银行存款60000元归还向工商银行的流动资金借款。
(5)6月22日，海欣医药公司用银行承兑汇票偿还的前欠货款100000元。
(6)6月28日，以银行汇票20000元偿还欠利华公司的购货款。
要求：根据上述资料，回答问题。

6月28日的经济业务应当核算的会计账户有______。

A．“预付账款”

B．“其他货币资金”

C．“银行存款”

D．“应付账款”

一辆摩托车以平均每小时30千米的速度行完了60千米的路程．在回家的路上，它的平均速度是每小时40千米．摩托车在整个来回的平均速度是多少？

下列说法中正确的是

A．石油分馏、煤的干馏均是物理变化

B．PM2.5是指氮、硫的氧化物溶于水形成的酸性液体造成的空气污染

C．可利用清洁能源如太阳能、潮汐能、风能来发电

D．铅蓄电池、锂电池、碱性锌锰干电池都属于二次电池

完形填空。
Several years ago, while attending a communication course, I experienced a most unusual process. The instructor asked us to list anything in our past that we felt   1   of, regretted, or incomplete about and read our lists aloud.     This seemed like a very   2   process, but there's always some brave soul in the crowd who will volunteer (be ready to). The instructor then   3   that we find ways to   4   people, or take some action to right any wrongdoings. I was seriously wondering how this could ever   5   my communication. Then the man next to me raised his hand and volunteered this story: "Making my   6  , I remembered an incident from high school. I grew up in a small town. There was a Sheriff none of us kids liked. One night, my two buddies(老兄) and I decided to play a   7   on him."      "After drinking a few beers, we climbed the tall water tank in the middle of the town, and wrote on the tank in bright red paint: Sheriff Brown is a FOX. The next day, almost the whole town saw our glorious   8  . Within two hours, Sheriff Brown had us in his office. My friends told the truth but I lied. No one   9   found out."      "Nearly 20 years later, Sheriff Brown's name   10   on my list. I didn't even know if he was still   11  . Last weekend, I dialed the information in my hometown and found there was a Roger Brown still listed.   I tried his number. After a few  12 , I heard, "Hello?" I said, "Sheriff Brown?" Paused "Yes". "Well, this is Jimmy Calkins."      "And I want you to know that I did it." Paused. "I knew it!" he yelled back. We had a good laugh and a   13   discussion. His closing words were: "Jimmy, I always felt bad for you because your buddies got it off their chest, but you were carrying it around all these years. I want to thank you for calling me …
( )1. A. ashamed     ( )2. A. private     ( )3. A. expected     ( )4. A. connect with ( )5. A. improve     ( )6. A. notes       ( )7. A. part         ( )8. A. view         ( )9. A. also         ( )10. A. appears     ( )11. A. angry       ( )12. A. words       ( )13. A. lively     ( )14. A. build up   ( )15. A. regret	B. afraid     B. secret     B. suggested B. depend on B. continue   B. list       B. game       B. sign       B. even       B. considers B. happy     B. calls     B. plain     B. make up   B. forgive	C. sure               C. interesting         C. ordered             C. make an apology to C. realize             C. plan               C. trick               C. attention           C. still               C. presents           C. doubtful           C. repeats             C. nervous             C. clear up           C. right	D. proud             D. funny             D. demanded         D. get along with   D. keep             D. stories           D. record           D. remark           D. ever             D. remembers         D. alive             D. rings             D. cold             D. give up           D. punish

石门揭煤防突的主要安全防护措施是什么？