问题
多项选择题
属于二氢叶酸还原酶抑制剂的是
A．磺胺甲噁唑
B．甲氧苄啶
C．乙胺嘧啶
D．氟尿嘧啶
E．甲氨蝶呤
答案
参考答案：B,C,D
搜题请搜索小程序“爱下问搜题”
属于二氢叶酸还原酶抑制剂的是
A．磺胺甲噁唑
B．甲氧苄啶
C．乙胺嘧啶
D．氟尿嘧啶
E．甲氨蝶呤
参考答案：B,C,D
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| Bill was a newspaper boy. He went from house to house 1 the day's papers to the neighbors. Each week he went to get his 2 . Bill kept a little book. In the book he wrote down who 3 him and who did not. Bill was keeping a record (记录) Men have been keeping records 4 very early time. How did they do this before they learned to write? Sometimes they made knots (打结) in different colored strings (绳子).Indians in South America kept records in this 5 . Today we have machines for 6 and keeping records. Do you go to the grocery store? Does it have a cash register? The cash register keeps records. It adds up the things you 7 . It tells how much is sold in the store everyday. Many places have machines called computers. They 8 computers to keep all the records. Computers are 9 than knots in strings. Someday men may use _10 even better than computers. | ||||
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