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【单选题】
磺胺类药物作用的原理是竞争性抑制细菌:A.
FH2 还原酶
B.
FH2 合成酶
C.
FH4 合成酶
D.
FH2 氧化酶
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Unit 03-6.mp3: Why does the man enjoy the flight?
A.
Because food is good
B.
Because service is good
C.
B oth A and B
【单选题】2 (76-78页Unit 3) Cars are mentioned in Paragraph 2 to show____
A.
the Internet can provide maps to guide drivers in traffic jams
B.
people can solve air pollution and traffic jams by using the Internet
C.
the Internet, like cars, brings convenience and causes problems at the same time
D.
the negative effects they cause
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