制冷机组有哪些方法用于气密性试验,哪一项是最重要的?
参考答案:
气压检漏、真空检漏和充制冷剂检漏。其中气压检漏尤为重要。
单词拼写。
根据下列句子及所给汉语注释或单词的首字母,写出空缺处各单词的正确形式。
(每空只写一词)
1.The flowers ______(闻起来) sweet are covering the desert like a blanket.
2. I offered him my ______(祝贺) on his passing the college entrance examination.
3. ______(考虑到) that he has worked several hours, he must be very tired.
4. ______(纵观)history, great thinkers have used their creativity and imagination to change the world.
5. He thought ______(差) of Tom than you did.
6. A penny saved is a penny ______(获得).
7. The names of many places in this country come from ____(德语).
8. Go ______(笔直地) down the road for about 200 meters and you will find it.
9. China marks the _____(九十) anniversary of "May Fourth Movement" on Monday.
10. Don`t pull the pages so hard that they will be ______(撕破).
对于汇兑结算,下列说法正确的有()。
A.汇兑凭证必须记载委托日期
B.汇入银行对开立账户的收款人,应将汇款直接转入收款人账户,所以收款人必须在银行开有账户
C.支取现金的信、电汇凭证上必须有汇出时按规定填明的"现金"字样
D.转汇的收款人必须是原收款人
E.汇入银行对于收款人拒绝接受的汇款,应即办理退汇