如果来证为Swift开信用证,由于Swift系统属于自动核押功能,所以不必担心真实性。
A. 对
B. 错
平面四杆机构,有a、b、c、d四根杆,其中a最短,b最长,则该四杆机构存在曲柄的条件是什么?
Fill in the blanks with the proper words given below.A. climateB. criticsC. crisisD. membershipE. swellingClimate change is an important problem requiring our utmost attention. Some 1. ______________ have made notice that the 2. ____________ of the earth is in _____________. All the environment protectors just enrolled or still in 4. _____________ should work in hands to protect the 5. _____________ planet, otherwise it may turn into disaster for human-being.
Match the words with correct chinese meaning.