不是竞争性抑制剂的化合物是()
A.5-氟尿嘧啶
B.甲氨蝶呤
C.6-巯基嘌呤
D.磺胺类化合物
E.嘌呤霉素
参考答案:E
After finishing middle school, my sister did nothing ____ at home.
A.but read
B.but to read
C.besides reading
D.except to read
芳香族聚酰胺纺制弹力丝