A．$5.B．$15.C．$30.D．$250. A: $5. B: $15. C: $30. D: $250.
A．$5.B．$15.C．$30.D．$250. A: $5. B: $15. C: $30. D: $250.
A steel company sells some steel to a bicycle company for $150. The bicycle company uses the steel to produce a bicycle，which it sells for $250. Taken together， these two transactions contribute（ ）. A: $250 to GDP. B: $150 to GDP. C: between $250 and $400 to GDP, depending on the profit earned by the bicycle company when it sold the bicycle. D: $400 to GDP.
A steel company sells some steel to a bicycle company for $150. The bicycle company uses the steel to produce a bicycle，which it sells for $250. Taken together， these two transactions contribute（ ）. A: $250 to GDP. B: $150 to GDP. C: between $250 and $400 to GDP, depending on the profit earned by the bicycle company when it sold the bicycle. D: $400 to GDP.
250.阀控型舵机油路在____应设安全阀
250.阀控型舵机油路在____应设安全阀
250.“名不正则言不顺，言不顺则事不成”是出自《（论语）》的名言
250.“名不正则言不顺，言不顺则事不成”是出自《（论语）》的名言
A．$50.B．$250.C．$500.D．$1,000. A: $50. B: $250. C: $500. D: $1,000.
A．$50.B．$250.C．$500.D．$1,000. A: $50. B: $250. C: $500. D: $1,000.
A．$250.B．$100.C．$80.D．$120. A: $250. B: $100. C: $80. D: $120.
A．$250.B．$100.C．$80.D．$120. A: $250. B: $100. C: $80. D: $120.
250.( )为保密期间，心理宣教要选择比较阴暗的房间进行。
250.( )为保密期间，心理宣教要选择比较阴暗的房间进行。
智慧职教: 250.网页上的商品标价陈列，我们只能视为要约邀请而非要约。（ ）
智慧职教: 250.网页上的商品标价陈列，我们只能视为要约邀请而非要约。（ ）
In the Xuzhou survey , how many children have extra private lessons A: 250. B: 25. C: 10. D: 3.
In the Xuzhou survey , how many children have extra private lessons A: 250. B: 25. C: 10. D: 3.
250.鱼藤酮抑制呼吸链中（） A: NADH→CoQ B: Cytc1→Cytc C: CoQ→Cytb D: Cytb→Cytc1 E: Cytaa3→O2
250.鱼藤酮抑制呼吸链中（） A: NADH→CoQ B: Cytc1→Cytc C: CoQ→Cytb D: Cytb→Cytc1 E: Cytaa3→O2