债券按发行者不同,分为政府债券、金融债券和( )。
A.企业债券
B.国家债券
C.地方债券
D.长期债券
参考答案:A
蛋白质的能量系数(kJ)为
A.16.7
B.17.2
C.18.2
D.23.5
E.39.54
The situation is getting worse. We must __________ the trouble _____________.
A.keep; spreading
B.prevent; spreading
C.stop; to spread
D.protect; to spread