Passage OneQuestions 26 to 28 are based on the passage you just heard.
A. because he has to wait until he bas three children
B. because he has to make enough money for his wife’s family
C. because it is a necessary ceremony at marriage
D. because it is a necessary type of gift to exchange at marriage
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National standards for paved roads were in placed by 1921.
It seems that Clinton’s signing the new federal highway bill partly due to ______.
Service station, motels and restaurants promoted the development of the interstate highway system.
磺胺类的作用机制是
A. 抑制细菌细胞壁合成
B. 影响细胞膜通透性
C. 抑制蛋白质合成
D. 抑制核酸代谢
E. 影响叶酸代谢
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