She has a gift for creating an atmospher

The number of pandas(熊猫)        becoming          .

A． is more and more

B． are less and less

C． is smaller and smaller

D． are fewer and fewer

Many of the big world sports events are _______by wealthy big companies, who hope to advertise their  companies or their products.     [ ]

A. organized    

B. arranged      

C. hosted    

D. sponsored

欲配10%NaCl溶液500g，应称取NaCl（）克。

A.50

B.450

C.）5

D.45

依据《砌体基本力学性能试验方法标准》中砌体沿通缝截面的弯曲抗拉强度试验，宜采用（）的方法。

低碳城市的发展规划必须要考虑的（）特点

A.经济发展

B.资源禀赋

C.社会发展

D.环境承受能力