对肾脏毒性最小的头孢菌素是:()
A.头孢唑啉
B.头孢噻吩
C.头孢孟多
D.头孢氨苄
E.头孢他定
参考答案:E
热凝塑料在气压聚合时,水的沸点可达 ()
A.90~100℃
B.100~110℃
C.110~120℃
D.120~130℃
E.130℃以上
—I can’t find my favourite magazine.
—I saw Jack going away with ________, but I’m not sure whether it’s yours.
A.it
B.that
C.one
D.some