He even _________ a Beijing Opera artist. [ ]
A.want to be
B.wants to be
C.is want
答案:B
《煤炭工业技术政策》规定,厚煤层工作面回采率为()。
A.93%
B.95%
C.97%
D.99%
NNO减水剂,其适宜掺量一般为水泥质量的()。
A.0.5%~1.0%
B.1.0%~1.5%
C.1.5%~2.0%
D.2.0%~2.5%