过梁上与过梁成600角的三角形范围及过梁净跨度()的高度范围内，不得在其上设置脚手眼。
A. 1/4
B. 1/3
C. 1/2
D. 2/3
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在病原菌结果出来前，经验性选用抗生素是
A. 青霉素
B. 红霉素
C. 第三代头孢菌素
D. 氨基糖苷类抗生素
E. 克林霉素
An increase in the money supply leads to______.
A. a decline in interest rates, a decrease in investment, and an increase in AD
B. a decline in interest rates, an increase in investment, and a decrease in AD
C. a decline in interest rates, an increase in investment, and an increase in AD
D. an increase in interest rate, an increase in investment, and an increase in AD
E. an increase in interest rate, a decrease in investment, and a decrease in AD
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