2010年获选美国高速公路交通安全局评选的“最安全的汽车”的车型是()
a.伊兰特
b.索纳塔
c.劳恩斯
参考答案:B
Speaking of all the songs he has written, I think this is probably his __________ one.
A.better-known
B.well-known
C.best-known
D.most-known
在正控诱导系统中,效应物分子的存在使激活蛋白处于非活性状态。 ( )