Danny is talking to the man beside ____________. [ ]
A. him
B. he
C. they
答案：A
甲烷中混有另一种或几种气态烃所组成的混合物1 L，完全燃烧需同温同压下的O2 3 L，并测得该气态烃混合物对氢气的相对密度为12.67，那么甲烷中可能混入的气态烃是
A．CnH2n+2(n>1)
B．CnH2n(n>2)
C．CnH2n(n>1)和CmH2m(m>2)
D．CnH2n-2(n>1)与CmH2m-2(m,n>1)
China has the ______ population of the world. [ ]
A. larger
B. most
C. many
D. largest
